Merge branch 'develop' into main

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

.beans/nuzlocke-tracker-bs05--build-pokedborg-encounter-data-scraper.md

@@ -1,17 +1,22 @@
 ---
 # nuzlocke-tracker-bs05
 title: Build PokeDB.org data import tool
-status: draft
-type: task
+status: completed
+type: feature
 priority: normal
 created_at: 2026-02-10T14:04:11Z
-updated_at: 2026-02-10T14:31:08Z
+updated_at: 2026-02-11T10:54:04Z
 parent: nuzlocke-tracker-rzu4
 blocking:
     - nuzlocke-tracker-spx3
 ---
 
-Build a Go tool that converts PokeDB.org's JSON data export into our existing seed JSON format. This replaces PokeAPI as the single source of truth for ALL games (Gen 1-9).
+Build a standalone Python tool that converts PokeDB.org's JSON data export into our existing seed JSON format. This replaces PokeAPI as the single source of truth for ALL games (Gen 1-9).
+
+Python was chosen over Go because:
+- The backend is already Python, so the team is familiar with it
+- We're processing local JSON files — no need for Go's concurrency
+- Remains a standalone tool in `tools/import-pokedb/`, not part of the backend
 
 ## Data source
 
@@ -64,26 +69,15 @@ Each encounter record has:
 - `visible` — overworld vs hidden encounter
 - Max Raid and Tera Raid fields for special encounters
 
-## Implementation approach
+## Subtasks
 
-### Checklist
-- [ ] Set up project structure in `tools/import-pokedb/`
-- [ ] Download and cache PokeDB JSON export files
-- [ ] Parse PokeDB encounters, locations, location_areas, versions, pokemon_forms
-- [ ] Build lookup maps: pokemon_form_identifier → pokeapi_id (using existing `pokemon.json`)
-- [ ] Build lookup maps: location_area_identifier → location name + region
-- [ ] Filter encounters by target game version
-- [ ] Map PokeDB encounter methods to our seed format methods (73 → simplified set)
-- [ ] Parse level strings ("2 - 4" → min_level: 2, max_level: 4)
-- [ ] Handle rate variants per game generation:
-  - For now, flatten time/weather/season rates into `encounter_rate` (use the max or average)
-  - Preserve raw variant data for future use (see nuzlocke-tracker-oqfo)
-- [ ] Group encounters by location area → route output
-- [ ] Apply route ordering (use existing route_order.json or generate from location data)
-- [ ] Output in existing `{game}.json` seed format
-- [ ] Generate seed data for ALL games, replacing PokeAPI as the single source of truth
-- [ ] Compare output against existing PokeAPI-sourced data to validate accuracy
-- [ ] Run for all games and verify output
+Work is broken into child task beans:
+
+- [ ] **Set up Python tool scaffold** — project structure, CLI entry point, PokeDB JSON file loading
+- [ ] **Build reference data mappings** — pokemon_form → pokeapi_id, location_area → name/region, encounter method mapping
+- [ ] **Core encounter processing** — filter by game version, parse levels, handle rate variants, group by location area
+- [ ] **Output seed JSON** — produce per-game JSON in existing format, integrate route ordering + special encounters
+- [ ] **Validation & full generation** — compare against existing data, run for all games, fix discrepancies
 
 ## Encounter method mapping (draft)
 

.beans/nuzlocke-tracker-dqyb--set-up-python-tool-scaffold.md

@@ -0,0 +1,30 @@
+---
+# nuzlocke-tracker-dqyb
+title: Set up Python tool scaffold
+status: completed
+type: task
+priority: normal
+created_at: 2026-02-11T08:42:58Z
+updated_at: 2026-02-11T08:49:55Z
+parent: nuzlocke-tracker-bs05
+blocking:
+    - nuzlocke-tracker-zno2
+---
+
+Set up the standalone Python tool project in `tools/import-pokedb/`.
+
+## Checklist
+
+- [x] Create `tools/import-pokedb/` directory structure
+- [x] Set up `pyproject.toml` with dependencies (just stdlib should suffice for JSON processing, maybe `click` for CLI)
+- [x] Create CLI entry point (`__main__.py` or similar) that accepts:
+  - Path to directory containing PokeDB JSON export files
+  - Target output directory (default: `backend/src/app/seeds/data/`)
+  - Optional: specific game version to generate (default: all)
+- [x] Load and parse all PokeDB JSON files: `encounters.json`, `locations.json`, `location_areas.json`, `encounter_methods.json`, `versions.json`, `pokemon_forms.json`
+- [x] Basic validation that all expected files are present and parseable
+
+## Notes
+- Keep it as a standalone tool, not part of the backend
+- The PokeDB JSON files are downloaded manually from https://pokedb.org/data-export — no need to automate the download
+- Model the CLI similarly to how `tools/fetch-pokeapi/` works (cd into dir, run the tool)

.beans/nuzlocke-tracker-gkcy--output-seed-json.md

@@ -0,0 +1,31 @@
+---
+# nuzlocke-tracker-gkcy
+title: Output seed JSON
+status: completed
+type: task
+priority: normal
+created_at: 2026-02-11T08:43:21Z
+updated_at: 2026-02-11T10:00:00Z
+parent: nuzlocke-tracker-bs05
+blocking:
+    - nuzlocke-tracker-vdks
+---
+
+Generate the final per-game JSON files in the existing seed format.
+
+## Checklist
+
+- [x] **Apply route ordering**: Use the existing `backend/src/app/seeds/route_order.json` to assign `order` values to routes. Handle aliases (e.g. "red-blue" → "firered-leafgreen"). Log warnings for routes not in the order file.
+- [x] **Merge special encounters**: Integrate starters, gifts, fossils, and trades from `backend/src/app/seeds/special_encounters.json` into the appropriate routes. Pokemon names are resolved to proper display names via PokemonMapper.
+- [x] **Output per-game JSON**: Write `{game-slug}.json` files matching the existing format:
+  ```json
+  [{"name": "Route 1", "order": 3, "encounters": [...], "children": []}]
+  ```
+- [x] **Output games.json**: Generate the global games list from `version_groups.json` — 38 games written, matching existing count.
+- [x] **Output pokemon.json**: Generate the global pokemon list including all pokemon referenced in any encounter. Include pokeapi_id, national_dex, name, types, sprite_url.
+- [x] **Handle version exclusives**: Encounters are filtered by `version_identifiers` per game — verified FireRed vs LeafGreen have 18 exclusives each.
+
+## Notes
+- The output must be a drop-in replacement for the existing files in `backend/src/app/seeds/data/`
+- Boss data (`{game}-bosses.json`) is NOT generated by this tool — it's manually curated
+- Evolutions data is also separate (currently from PokeAPI) — out of scope for this task

.beans/nuzlocke-tracker-rfg0--core-encounter-processing.md

@@ -0,0 +1,34 @@
+---
+# nuzlocke-tracker-rfg0
+title: Core encounter processing
+status: completed
+type: task
+priority: normal
+created_at: 2026-02-11T08:43:12Z
+updated_at: 2026-02-11T09:12:59Z
+parent: nuzlocke-tracker-bs05
+blocking:
+    - nuzlocke-tracker-gkcy
+---
+
+Implement the core logic that transforms raw PokeDB encounter records into our internal format.
+
+## Checklist
+
+- [x] **Filter by game version**: Given a target game slug, select only encounters where `version_identifiers` includes that game
+- [x] **Parse level strings**: Convert "2 - 4" → min_level=2, max_level=4; "67" → min_level=67, max_level=67
+- [x] **Handle rate variants per generation**:
+  - Gen 1/3/6: use `rate_overall` directly as `encounter_rate`
+  - Gen 2/4: `rate_morning`, `rate_day`, `rate_night` — flatten to max or average for `encounter_rate`
+  - Gen 5: `rate_spring` through `rate_winter` — flatten similarly
+  - Gen 8 Sw/Sh: `weather_*_rate` fields — flatten to max
+  - Gen 8 Legends Arceus: `during_*` / `while_*` booleans — convert to a presence-based rate
+  - Gen 9 Sc/Vi: `probability_*` fields (spawn weights, not percentages) — normalize to percentages
+  - Preserve raw variant data in a way that nuzlocke-tracker-oqfo can use later
+- [x] **Aggregate encounters**: Group by (pokemon, method, location_area) and merge level ranges / rates where appropriate (same logic as the Go tool's aggregation)
+- [x] **Group by location area**: Collect all encounters for a location area into a route structure
+- [x] **Handle parent/child routes**: Multi-area locations (e.g. Safari Zone) should produce parent routes with children, matching the existing hierarchical format
+
+## Notes
+- Rate parsing needs to handle percentage strings like "40%" as well as bare numbers
+- The Go tool aggregates encounters with the same pokemon+method at a location into a single entry with merged level ranges — replicate this

.beans/nuzlocke-tracker-vdks--validation-and-full-generation.md

@@ -0,0 +1,26 @@
+---
+# nuzlocke-tracker-vdks
+title: Validation and full generation
+status: completed
+type: task
+priority: normal
+created_at: 2026-02-11T08:43:29Z
+updated_at: 2026-02-11T10:52:55Z
+parent: nuzlocke-tracker-bs05
+---
+
+Validate the new tool's output against existing data and generate seed data for all games.
+
+## Checklist
+
+- [x] **Diff against existing data**: Compared all 37 games. Route names differ systematically (PokeDB uses proper punctuation/region qualifiers). Encounter counts are generally higher (PokeDB more complete). Version exclusives verified.
+- [x] **Fix discrepancies**: Fixed: games.json missing `category` field, pokemon.json missing 231 non-encountered pokemon (evolutions etc.), pokemon name casing in special encounters, sprite coverage for all 1350 pokemon, type coverage using fallback to existing data.
+- [x] **Generate for all games**: All 37 games (+ legends-z-a with no data) generated successfully. All 39 JSON files validated. 7 previously empty games now populated (Sw/Sh, BDSP, PLA, Sc/Vi).
+- [x] **New game coverage**: Sword/Shield (1052 routes, 8900 encounters), Scarlet/Violet (415 routes, ~3850 encounters), Legends Arceus (88 routes, 1582 encounters), BDSP (177 routes, ~1840 encounters) — all reasonable.
+- [ ] **Update route_order.json**: 11 version groups have route orders, 11 are missing (diamond-pearl, black-white, black-2-white-2, x-y, sun-moon, ultra-sun-ultra-moon, sword-shield, brilliant-diamond-shining-pearl, legends-arceus, scarlet-violet). Requires manual curation.
+- [ ] **Update special_encounters.json**: Currently only covers 3 version groups (firered-leafgreen, heartgold-soulsilver, emerald + aliases). Requires manual curation for other games.
+
+## Notes
+- This is the final validation step before we can replace PokeAPI as the data source
+- Some discrepancies are expected — PokeDB may have more complete data than PokeAPI
+- Route ordering for new games will likely need manual work

.beans/nuzlocke-tracker-zno2--build-reference-data-mappings.md

@@ -0,0 +1,26 @@
+---
+# nuzlocke-tracker-zno2
+title: Build reference data mappings
+status: completed
+type: task
+priority: normal
+created_at: 2026-02-11T08:43:02Z
+updated_at: 2026-02-11T09:03:01Z
+parent: nuzlocke-tracker-bs05
+blocking:
+    - nuzlocke-tracker-rfg0
+---
+
+Build the lookup maps needed to translate PokeDB identifiers into our seed format.
+
+## Checklist
+
+- [x] **Pokemon form mapping**: Map `pokemon_form_identifier` (e.g. "pidgey-default", "mr-mime-default") to `pokeapi_id` using the existing `backend/src/app/seeds/data/pokemon.json` as reference. Handle naming convention differences between PokeDB and PokeAPI (may need fuzzy matching or a manual override table).
+- [x] **Location area mapping**: Map `location_area_identifier` to human-readable location names and regions using `locations.json` and `location_areas.json`. Produce names matching our existing format (e.g. "Route 1", "Viridian Forest").
+- [x] **Encounter method mapping**: Map PokeDB's 73 encounter methods to our simplified set. See the draft mapping in the parent bean. Implement as a dictionary/config that's easy to extend.
+- [x] **Version mapping**: Map PokeDB `version_identifiers` to our game slugs (should mostly be 1:1 but verify).
+
+## Notes
+- The pokemon form mapping is the trickiest part — PokeDB uses identifiers like "mr-mime-default" while our pokemon.json uses names like "Mr. Mime" and pokeapi IDs
+- Log warnings for any unmapped identifiers so we can add overrides
+- The `pokemon_forms.json` from PokeDB may help bridge the gap

.gitignore

@@ -60,8 +60,12 @@ temp/
 *.tmp
 *.temp
 
-# PokeAPI fetch cache
+# PokeAPI / PokeDB data cache
 .pokeapi_cache/
+.pokedb_cache/
+
+# Generated sprites (downloaded by import-pokedb tool)
+frontend/public/sprites/
 
 # Go build output
 tools/fetch-pokeapi/fetch-pokeapi

backend/src/app/seeds/data/games.json

@@ -1,344 +1,344 @@
 [
   {
-    "name": "Pokemon Alpha Sapphire",
-    "slug": "alpha-sapphire",
-    "generation": 6,
-    "region": "hoenn",
-    "category": "remake",
-    "release_year": 2014,
-    "color": "#26649C"
-  },
-  {
-    "name": "Pokemon Black",
-    "slug": "black",
-    "generation": 5,
-    "region": "unova",
-    "category": "original",
-    "release_year": 2010,
-    "color": "#444444"
-  },
-  {
-    "name": "Pokemon Black 2",
-    "slug": "black-2",
-    "generation": 5,
-    "region": "unova",
-    "category": "sequel",
-    "release_year": 2012,
-    "color": "#424B50"
+    "name": "Pokemon Red",
+    "slug": "red",
+    "generation": 1,
+    "region": "kanto",
+    "release_year": 1996,
+    "color": "#FF1111",
+    "category": "original"
   },
   {
     "name": "Pokemon Blue",
     "slug": "blue",
     "generation": 1,
     "region": "kanto",
-    "category": "original",
     "release_year": 1996,
-    "color": "#1111FF"
-  },
-  {
-    "name": "Pokemon Brilliant Diamond",
-    "slug": "brilliant-diamond",
-    "generation": 8,
-    "region": "sinnoh",
-    "category": "remake",
-    "release_year": 2021,
-    "color": "#44BAE5"
-  },
-  {
-    "name": "Pokemon Crystal",
-    "slug": "crystal",
-    "generation": 2,
-    "region": "johto",
-    "category": "enhanced",
-    "release_year": 2000,
-    "color": "#4FD9FF"
-  },
-  {
-    "name": "Pokemon Diamond",
-    "slug": "diamond",
-    "generation": 4,
-    "region": "sinnoh",
-    "category": "original",
-    "release_year": 2006,
-    "color": "#AAAAFF"
-  },
-  {
-    "name": "Pokemon Emerald",
-    "slug": "emerald",
-    "generation": 3,
-    "region": "hoenn",
-    "category": "enhanced",
-    "release_year": 2005,
-    "color": "#00A000"
-  },
-  {
-    "name": "Pokemon FireRed",
-    "slug": "firered",
-    "generation": 3,
-    "region": "kanto",
-    "category": "remake",
-    "release_year": 2004,
-    "color": "#FF7327"
-  },
-  {
-    "name": "Pokemon Gold",
-    "slug": "gold",
-    "generation": 2,
-    "region": "johto",
-    "category": "original",
-    "release_year": 1999,
-    "color": "#DAA520"
-  },
-  {
-    "name": "Pokemon HeartGold",
-    "slug": "heartgold",
-    "generation": 4,
-    "region": "johto",
-    "category": "remake",
-    "release_year": 2010,
-    "color": "#B69E00"
-  },
-  {
-    "name": "Pokemon LeafGreen",
-    "slug": "leafgreen",
-    "generation": 3,
-    "region": "kanto",
-    "category": "remake",
-    "release_year": 2004,
-    "color": "#00DD00"
-  },
-  {
-    "name": "Pokemon Legends: Arceus",
-    "slug": "legends-arceus",
-    "generation": 8,
-    "region": "hisui",
-    "category": "spinoff",
-    "release_year": 2022,
-    "color": "#36597B"
-  },
-  {
-    "name": "Pokemon Legends: Z-A",
-    "slug": "legends-z-a",
-    "generation": 9,
-    "region": "lumiose",
-    "category": "spinoff",
-    "release_year": 2025,
-    "color": "#3A7BDB"
-  },
-  {
-    "name": "Pokemon Let's Go Eevee",
-    "slug": "lets-go-eevee",
-    "generation": 7,
-    "region": "kanto",
-    "category": "remake",
-    "release_year": 2018,
-    "color": "#D4924B"
-  },
-  {
-    "name": "Pokemon Let's Go Pikachu",
-    "slug": "lets-go-pikachu",
-    "generation": 7,
-    "region": "kanto",
-    "category": "remake",
-    "release_year": 2018,
-    "color": "#F5DA00"
-  },
-  {
-    "name": "Pokemon Moon",
-    "slug": "moon",
-    "generation": 7,
-    "region": "alola",
-    "category": "original",
-    "release_year": 2016,
-    "color": "#5599CA"
-  },
-  {
-    "name": "Pokemon Omega Ruby",
-    "slug": "omega-ruby",
-    "generation": 6,
-    "region": "hoenn",
-    "category": "remake",
-    "release_year": 2014,
-    "color": "#CF3025"
-  },
-  {
-    "name": "Pokemon Pearl",
-    "slug": "pearl",
-    "generation": 4,
-    "region": "sinnoh",
-    "category": "original",
-    "release_year": 2006,
-    "color": "#FFAAAA"
-  },
-  {
-    "name": "Pokemon Platinum",
-    "slug": "platinum",
-    "generation": 4,
-    "region": "sinnoh",
-    "category": "enhanced",
-    "release_year": 2008,
-    "color": "#999999"
-  },
-  {
-    "name": "Pokemon Red",
-    "slug": "red",
-    "generation": 1,
-    "region": "kanto",
-    "category": "original",
-    "release_year": 1996,
-    "color": "#FF1111"
-  },
-  {
-    "name": "Pokemon Ruby",
-    "slug": "ruby",
-    "generation": 3,
-    "region": "hoenn",
-    "category": "original",
-    "release_year": 2002,
-    "color": "#A00000"
-  },
-  {
-    "name": "Pokemon Sapphire",
-    "slug": "sapphire",
-    "generation": 3,
-    "region": "hoenn",
-    "category": "original",
-    "release_year": 2002,
-    "color": "#0000A0"
-  },
-  {
-    "name": "Pokemon Scarlet",
-    "slug": "scarlet",
-    "generation": 9,
-    "region": "paldea",
-    "category": "original",
-    "release_year": 2022,
-    "color": "#F93C3C"
-  },
-  {
-    "name": "Pokemon Shield",
-    "slug": "shield",
-    "generation": 8,
-    "region": "galar",
-    "category": "original",
-    "release_year": 2019,
-    "color": "#EF3B6E"
-  },
-  {
-    "name": "Pokemon Shining Pearl",
-    "slug": "shining-pearl",
-    "generation": 8,
-    "region": "sinnoh",
-    "category": "remake",
-    "release_year": 2021,
-    "color": "#E18AAA"
-  },
-  {
-    "name": "Pokemon Silver",
-    "slug": "silver",
-    "generation": 2,
-    "region": "johto",
-    "category": "original",
-    "release_year": 1999,
-    "color": "#C0C0C0"
-  },
-  {
-    "name": "Pokemon SoulSilver",
-    "slug": "soulsilver",
-    "generation": 4,
-    "region": "johto",
-    "category": "remake",
-    "release_year": 2010,
-    "color": "#C0C0E0"
-  },
-  {
-    "name": "Pokemon Sun",
-    "slug": "sun",
-    "generation": 7,
-    "region": "alola",
-    "category": "original",
-    "release_year": 2016,
-    "color": "#F1912B"
-  },
-  {
-    "name": "Pokemon Sword",
-    "slug": "sword",
-    "generation": 8,
-    "region": "galar",
-    "category": "original",
-    "release_year": 2019,
-    "color": "#00D4E7"
-  },
-  {
-    "name": "Pokemon Ultra Moon",
-    "slug": "ultra-moon",
-    "generation": 7,
-    "region": "alola",
-    "category": "enhanced",
-    "release_year": 2017,
-    "color": "#204E8C"
-  },
-  {
-    "name": "Pokemon Ultra Sun",
-    "slug": "ultra-sun",
-    "generation": 7,
-    "region": "alola",
-    "category": "enhanced",
-    "release_year": 2017,
-    "color": "#E95B2B"
-  },
-  {
-    "name": "Pokemon Violet",
-    "slug": "violet",
-    "generation": 9,
-    "region": "paldea",
-    "category": "original",
-    "release_year": 2022,
-    "color": "#A96EEC"
-  },
-  {
-    "name": "Pokemon White",
-    "slug": "white",
-    "generation": 5,
-    "region": "unova",
-    "category": "original",
-    "release_year": 2010,
-    "color": "#E1E1E1"
-  },
-  {
-    "name": "Pokemon White 2",
-    "slug": "white-2",
-    "generation": 5,
-    "region": "unova",
-    "category": "sequel",
-    "release_year": 2012,
-    "color": "#E3CED0"
-  },
-  {
-    "name": "Pokemon X",
-    "slug": "x",
-    "generation": 6,
-    "region": "kalos",
-    "category": "original",
-    "release_year": 2013,
-    "color": "#025DA6"
-  },
-  {
-    "name": "Pokemon Y",
-    "slug": "y",
-    "generation": 6,
-    "region": "kalos",
-    "category": "original",
-    "release_year": 2013,
-    "color": "#EA1A3E"
+    "color": "#1111FF",
+    "category": "original"
   },
   {
     "name": "Pokemon Yellow",
     "slug": "yellow",
     "generation": 1,
     "region": "kanto",
-    "category": "enhanced",
     "release_year": 1998,
-    "color": "#FFD733"
+    "color": "#FFD733",
+    "category": "enhanced"
+  },
+  {
+    "name": "Pokemon Gold",
+    "slug": "gold",
+    "generation": 2,
+    "region": "johto",
+    "release_year": 1999,
+    "color": "#DAA520",
+    "category": "original"
+  },
+  {
+    "name": "Pokemon Silver",
+    "slug": "silver",
+    "generation": 2,
+    "region": "johto",
+    "release_year": 1999,
+    "color": "#C0C0C0",
+    "category": "original"
+  },
+  {
+    "name": "Pokemon Crystal",
+    "slug": "crystal",
+    "generation": 2,
+    "region": "johto",
+    "release_year": 2000,
+    "color": "#4FD9FF",
+    "category": "enhanced"
+  },
+  {
+    "name": "Pokemon Ruby",
+    "slug": "ruby",
+    "generation": 3,
+    "region": "hoenn",
+    "release_year": 2002,
+    "color": "#A00000",
+    "category": "original"
+  },
+  {
+    "name": "Pokemon Sapphire",
+    "slug": "sapphire",
+    "generation": 3,
+    "region": "hoenn",
+    "release_year": 2002,
+    "color": "#0000A0",
+    "category": "original"
+  },
+  {
+    "name": "Pokemon Emerald",
+    "slug": "emerald",
+    "generation": 3,
+    "region": "hoenn",
+    "release_year": 2005,
+    "color": "#00A000",
+    "category": "enhanced"
+  },
+  {
+    "name": "Pokemon FireRed",
+    "slug": "firered",
+    "generation": 3,
+    "region": "kanto",
+    "release_year": 2004,
+    "color": "#FF7327",
+    "category": "remake"
+  },
+  {
+    "name": "Pokemon LeafGreen",
+    "slug": "leafgreen",
+    "generation": 3,
+    "region": "kanto",
+    "release_year": 2004,
+    "color": "#00DD00",
+    "category": "remake"
+  },
+  {
+    "name": "Pokemon Diamond",
+    "slug": "diamond",
+    "generation": 4,
+    "region": "sinnoh",
+    "release_year": 2006,
+    "color": "#AAAAFF",
+    "category": "original"
+  },
+  {
+    "name": "Pokemon Pearl",
+    "slug": "pearl",
+    "generation": 4,
+    "region": "sinnoh",
+    "release_year": 2006,
+    "color": "#FFAAAA",
+    "category": "original"
+  },
+  {
+    "name": "Pokemon Platinum",
+    "slug": "platinum",
+    "generation": 4,
+    "region": "sinnoh",
+    "release_year": 2008,
+    "color": "#999999",
+    "category": "enhanced"
+  },
+  {
+    "name": "Pokemon HeartGold",
+    "slug": "heartgold",
+    "generation": 4,
+    "region": "johto",
+    "release_year": 2010,
+    "color": "#B69E00",
+    "category": "remake"
+  },
+  {
+    "name": "Pokemon SoulSilver",
+    "slug": "soulsilver",
+    "generation": 4,
+    "region": "johto",
+    "release_year": 2010,
+    "color": "#C0C0E0",
+    "category": "remake"
+  },
+  {
+    "name": "Pokemon Black",
+    "slug": "black",
+    "generation": 5,
+    "region": "unova",
+    "release_year": 2010,
+    "color": "#444444",
+    "category": "original"
+  },
+  {
+    "name": "Pokemon White",
+    "slug": "white",
+    "generation": 5,
+    "region": "unova",
+    "release_year": 2010,
+    "color": "#E1E1E1",
+    "category": "original"
+  },
+  {
+    "name": "Pokemon Black 2",
+    "slug": "black-2",
+    "generation": 5,
+    "region": "unova",
+    "release_year": 2012,
+    "color": "#424B50",
+    "category": "sequel"
+  },
+  {
+    "name": "Pokemon White 2",
+    "slug": "white-2",
+    "generation": 5,
+    "region": "unova",
+    "release_year": 2012,
+    "color": "#E3CED0",
+    "category": "sequel"
+  },
+  {
+    "name": "Pokemon X",
+    "slug": "x",
+    "generation": 6,
+    "region": "kalos",
+    "release_year": 2013,
+    "color": "#025DA6",
+    "category": "original"
+  },
+  {
+    "name": "Pokemon Y",
+    "slug": "y",
+    "generation": 6,
+    "region": "kalos",
+    "release_year": 2013,
+    "color": "#EA1A3E",
+    "category": "original"
+  },
+  {
+    "name": "Pokemon Omega Ruby",
+    "slug": "omega-ruby",
+    "generation": 6,
+    "region": "hoenn",
+    "release_year": 2014,
+    "color": "#CF3025",
+    "category": "remake"
+  },
+  {
+    "name": "Pokemon Alpha Sapphire",
+    "slug": "alpha-sapphire",
+    "generation": 6,
+    "region": "hoenn",
+    "release_year": 2014,
+    "color": "#26649C",
+    "category": "remake"
+  },
+  {
+    "name": "Pokemon Sun",
+    "slug": "sun",
+    "generation": 7,
+    "region": "alola",
+    "release_year": 2016,
+    "color": "#F1912B",
+    "category": "original"
+  },
+  {
+    "name": "Pokemon Moon",
+    "slug": "moon",
+    "generation": 7,
+    "region": "alola",
+    "release_year": 2016,
+    "color": "#5599CA",
+    "category": "original"
+  },
+  {
+    "name": "Pokemon Ultra Sun",
+    "slug": "ultra-sun",
+    "generation": 7,
+    "region": "alola",
+    "release_year": 2017,
+    "color": "#E95B2B",
+    "category": "enhanced"
+  },
+  {
+    "name": "Pokemon Ultra Moon",
+    "slug": "ultra-moon",
+    "generation": 7,
+    "region": "alola",
+    "release_year": 2017,
+    "color": "#204E8C",
+    "category": "enhanced"
+  },
+  {
+    "name": "Pokemon Let's Go Pikachu",
+    "slug": "lets-go-pikachu",
+    "generation": 7,
+    "region": "kanto",
+    "release_year": 2018,
+    "color": "#F5DA00",
+    "category": "remake"
+  },
+  {
+    "name": "Pokemon Let's Go Eevee",
+    "slug": "lets-go-eevee",
+    "generation": 7,
+    "region": "kanto",
+    "release_year": 2018,
+    "color": "#D4924B",
+    "category": "remake"
+  },
+  {
+    "name": "Pokemon Sword",
+    "slug": "sword",
+    "generation": 8,
+    "region": "galar",
+    "release_year": 2019,
+    "color": "#00D4E7",
+    "category": "original"
+  },
+  {
+    "name": "Pokemon Shield",
+    "slug": "shield",
+    "generation": 8,
+    "region": "galar",
+    "release_year": 2019,
+    "color": "#EF3B6E",
+    "category": "original"
+  },
+  {
+    "name": "Pokemon Brilliant Diamond",
+    "slug": "brilliant-diamond",
+    "generation": 8,
+    "region": "sinnoh",
+    "release_year": 2021,
+    "color": "#44BAE5",
+    "category": "remake"
+  },
+  {
+    "name": "Pokemon Shining Pearl",
+    "slug": "shining-pearl",
+    "generation": 8,
+    "region": "sinnoh",
+    "release_year": 2021,
+    "color": "#E18AAA",
+    "category": "remake"
+  },
+  {
+    "name": "Pokemon Legends: Arceus",
+    "slug": "legends-arceus",
+    "generation": 8,
+    "region": "hisui",
+    "release_year": 2022,
+    "color": "#36597B",
+    "category": "spinoff"
+  },
+  {
+    "name": "Pokemon Scarlet",
+    "slug": "scarlet",
+    "generation": 9,
+    "region": "paldea",
+    "release_year": 2022,
+    "color": "#F93C3C",
+    "category": "original"
+  },
+  {
+    "name": "Pokemon Violet",
+    "slug": "violet",
+    "generation": 9,
+    "region": "paldea",
+    "release_year": 2022,
+    "color": "#A96EEC",
+    "category": "original"
+  },
+  {
+    "name": "Pokemon Legends: Z-A",
+    "slug": "legends-z-a",
+    "generation": 9,
+    "region": "lumiose",
+    "release_year": 2025,
+    "color": "#3A7BDB",
+    "category": "spinoff"
   }
 ]

tools/import-pokedb/import_pokedb/__main__.py

@@ -0,0 +1,239 @@
+"""CLI entry point for the PokeDB import tool.
+
+Usage:
+    # From tools/import-pokedb/ (auto-downloads PokeDB data on first run):
+    python -m import_pokedb
+
+    # With options:
+    python -m import_pokedb --game firered
+    python -m import_pokedb --pokedb-dir ~/my-pokedb-data/
+    python -m import_pokedb --output /tmp/seed-output/
+"""
+
+from __future__ import annotations
+
+import argparse
+import sys
+from pathlib import Path
+
+from .loader import load_pokedb_data, load_seed_config
+from .mappings import PokemonMapper, LocationMapper, build_version_map, map_encounter_method
+from .output import sort_routes, merge_special_encounters, write_game_json, write_games_json, write_pokemon_json
+from .processing import filter_encounters_for_game, process_encounters, build_routes
+from .sprites import download_all_sprites, download_sprites
+
+SEEDS_DIR_CANDIDATES = [
+    Path("backend/src/app/seeds"),                # from repo root
+    Path("../../backend/src/app/seeds"),           # from tools/import-pokedb/
+]
+
+SPRITES_DIR_CANDIDATES = [
+    Path("frontend/public/sprites"),              # from repo root
+    Path("../../frontend/public/sprites"),         # from tools/import-pokedb/
+]
+
+
+def find_seeds_dir() -> Path:
+    """Locate the backend seeds directory."""
+    for candidate in SEEDS_DIR_CANDIDATES:
+        if (candidate / "version_groups.json").exists():
+            return candidate.resolve()
+    # Fallback
+    return Path("backend/src/app/seeds").resolve()
+
+
+def find_sprites_dir() -> Path:
+    """Locate the frontend sprites directory."""
+    for candidate in SPRITES_DIR_CANDIDATES:
+        if candidate.parent.exists():
+            return candidate.resolve()
+    # Fallback
+    return Path("frontend/public/sprites").resolve()
+
+
+def build_parser() -> argparse.ArgumentParser:
+    parser = argparse.ArgumentParser(
+        prog="import-pokedb",
+        description="Convert PokeDB.org JSON data exports into nuzlocke-tracker seed format.",
+    )
+    parser.add_argument(
+        "--pokedb-dir",
+        type=Path,
+        default=None,
+        help="Path to directory containing PokeDB JSON export files (default: .pokedb_cache/)",
+    )
+    parser.add_argument(
+        "--output",
+        type=Path,
+        default=None,
+        help="Output directory for seed JSON files (default: backend/src/app/seeds/data/)",
+    )
+    parser.add_argument(
+        "--game",
+        type=str,
+        default=None,
+        help="Generate data for a specific game slug only (default: all games)",
+    )
+    return parser
+
+
+def main(argv: list[str] | None = None) -> None:
+    parser = build_parser()
+    args = parser.parse_args(argv)
+
+    seeds_dir = find_seeds_dir()
+    pokedb_dir: Path = args.pokedb_dir or (seeds_dir / ".pokedb_cache")
+    output_dir: Path = args.output or (seeds_dir / "data")
+    output_dir.mkdir(parents=True, exist_ok=True)
+
+    print(f"PokeDB data:  {pokedb_dir.resolve()}")
+    print(f"Seeds config: {seeds_dir}")
+    print(f"Output:       {output_dir.resolve()}")
+    print()
+
+    # Load PokeDB export data
+    pokedb = load_pokedb_data(pokedb_dir)
+    print(pokedb.summary())
+    print()
+
+    # Load existing seed configuration
+    config = load_seed_config(seeds_dir)
+    print(f"Loaded {len(config.version_groups)} version groups")
+    print(f"Loaded route order for {len(config.route_order)} version groups")
+    if config.special_encounters:
+        se_count = len(config.special_encounters.get("encounters", {}))
+        print(f"Loaded special encounters for {se_count} version groups")
+    print()
+
+    # Determine which games to process
+    target_game = args.game
+    if target_game:
+        found = False
+        for vg_info in config.version_groups.values():
+            if target_game in vg_info.get("versions", []):
+                found = True
+                break
+        if not found:
+            print(f"Error: Game '{target_game}' not found in version_groups.json", file=sys.stderr)
+            sys.exit(1)
+        print(f"Target: {target_game}")
+    else:
+        total_games = sum(
+            len(vg.get("versions", []))
+            for vg in config.version_groups.values()
+        )
+        print(f"Target: all {total_games} games")
+
+    # Build mappings
+    print("\nBuilding mappings...")
+
+    pokemon_json = seeds_dir / "data" / "pokemon.json"
+    pokemon_mapper = PokemonMapper(pokemon_json, pokedb)
+
+    location_mapper = LocationMapper(pokedb)
+
+    version_map = build_version_map(pokedb, config.version_groups)
+    print(f"  Mapped {len(version_map)} PokeDB versions to our game slugs")
+
+    # Report encounter method coverage
+    pokedb_methods = {e.get("encounter_method_identifier", "") for e in pokedb.encounters}
+    pokedb_methods.discard("")
+    mapped_methods = {m for m in pokedb_methods if map_encounter_method(m) is not None}
+    unmapped_methods = pokedb_methods - mapped_methods
+    print(f"  Encounter methods: {len(mapped_methods)} mapped, {len(unmapped_methods)} unmapped")
+    if unmapped_methods:
+        print("  Unmapped methods:", file=sys.stderr)
+        for m in sorted(unmapped_methods):
+            print(f"    - {m}", file=sys.stderr)
+
+    # Spot-check pokemon mapping on actual encounter data
+    form_ids_in_encounters: set[str] = set()
+    for e in pokedb.encounters:
+        fid = e.get("pokemon_form_identifier")
+        if fid:
+            form_ids_in_encounters.add(fid)
+    mapped_forms = 0
+    for fid in form_ids_in_encounters:
+        if pokemon_mapper.lookup(fid) is not None:
+            mapped_forms += 1
+    total_forms = len(form_ids_in_encounters)
+    print(f"  Pokemon forms: {mapped_forms}/{total_forms} mapped from encounters")
+
+    pokemon_mapper.report_unmapped()
+
+    # Process encounters per game
+    print("\nProcessing encounters...")
+
+    games_to_process: list[tuple[str, str, int]] = []  # (vg_key, game_slug, generation)
+    for vg_key, vg_info in config.version_groups.items():
+        generation = vg_info.get("generation", 0)
+        for slug in vg_info.get("versions", []):
+            if target_game and slug != target_game:
+                continue
+            games_to_process.append((vg_key, slug, generation))
+
+    all_encountered_form_ids: set[str] = set()
+
+    for vg_key, game_slug, generation in games_to_process:
+        print(f"\n--- {game_slug} ---")
+
+        # Filter encounters for this game
+        game_encounters = filter_encounters_for_game(pokedb.encounters, game_slug)
+        if not game_encounters:
+            print(f"  No encounters found in PokeDB data")
+            continue
+
+        print(f"  Raw encounters: {len(game_encounters)}")
+
+        # Track encountered form IDs for pokemon.json
+        for e in game_encounters:
+            fid = e.get("pokemon_form_identifier")
+            if fid:
+                all_encountered_form_ids.add(fid)
+
+        # Process into grouped encounters
+        encounters_by_area = process_encounters(
+            game_encounters, generation, pokemon_mapper, location_mapper,
+        )
+        print(f"  Location areas with encounters: {len(encounters_by_area)}")
+
+        # Build route hierarchy
+        routes = build_routes(encounters_by_area, location_mapper)
+
+        # Merge special encounters (starters, gifts, fossils)
+        routes = merge_special_encounters(routes, config, vg_key, pokemon_mapper)
+
+        # Sort routes by game progression order
+        routes = sort_routes(routes, config, vg_key)
+
+        # Stats
+        total_routes = sum(1 + len(r.children) for r in routes)
+        total_enc = sum(
+            len(r.encounters) + sum(len(c.encounters) for c in r.children)
+            for r in routes
+        )
+        print(f"  Routes: {total_routes}")
+        print(f"  Encounter entries: {total_enc}")
+
+        # Write per-game JSON
+        write_game_json(routes, output_dir, game_slug)
+
+    # Download sprites to frontend/public/sprites
+    sprites_dir = find_sprites_dir()
+    print(f"\nDownloading sprites to {sprites_dir}...")
+    sprite_map = download_sprites(pokemon_mapper, all_encountered_form_ids, sprites_dir)
+    print(f"  Sprite map covers {len(sprite_map)} forms")
+
+    # Download sprites for ALL pokemon (including non-encountered evolutions etc.)
+    all_sprite_ids = download_all_sprites(pokemon_mapper, sprites_dir)
+
+    # Write global JSON files
+    print("\nWriting global data files...")
+    write_games_json(config, output_dir)
+    write_pokemon_json(pokemon_mapper, all_encountered_form_ids, sprite_map, output_dir)
+
+    print("\nDone!")
+
+
+if __name__ == "__main__":
+    main()

tools/import-pokedb/import_pokedb/loader.py

@@ -0,0 +1,168 @@
+"""Load and validate PokeDB JSON export files."""
+
+from __future__ import annotations
+
+import json
+import sys
+import urllib.request
+from pathlib import Path
+from typing import Any
+
+_CDN_BASE = "https://cdn.pokedb.org"
+
+REQUIRED_FILES: dict[str, str] = {
+    "encounters.json": f"{_CDN_BASE}/data_export_encounters_json",
+    "locations.json": f"{_CDN_BASE}/data_export_locations_json",
+    "location_areas.json": f"{_CDN_BASE}/data_export_location_areas_json",
+    "encounter_methods.json": f"{_CDN_BASE}/data_export_encounter_methods_json",
+    "versions.json": f"{_CDN_BASE}/data_export_versions_json",
+    "pokemon_forms.json": f"{_CDN_BASE}/data_export_pokemon_forms_json",
+}
+
+
+class PokeDBData:
+    """Container for all loaded PokeDB export data."""
+
+    def __init__(
+        self,
+        encounters: list[dict[str, Any]],
+        locations: list[dict[str, Any]],
+        location_areas: list[dict[str, Any]],
+        encounter_methods: list[dict[str, Any]],
+        versions: list[dict[str, Any]],
+        pokemon_forms: list[dict[str, Any]],
+    ) -> None:
+        self.encounters = encounters
+        self.locations = locations
+        self.location_areas = location_areas
+        self.encounter_methods = encounter_methods
+        self.versions = versions
+        self.pokemon_forms = pokemon_forms
+
+    def summary(self) -> str:
+        return (
+            f"PokeDB data loaded:\n"
+            f"  encounters:        {len(self.encounters):,}\n"
+            f"  locations:         {len(self.locations):,}\n"
+            f"  location_areas:    {len(self.location_areas):,}\n"
+            f"  encounter_methods: {len(self.encounter_methods):,}\n"
+            f"  versions:          {len(self.versions):,}\n"
+            f"  pokemon_forms:     {len(self.pokemon_forms):,}"
+        )
+
+
+def download_pokedb_data(data_dir: Path) -> None:
+    """Download missing PokeDB JSON export files into data_dir."""
+    data_dir.mkdir(parents=True, exist_ok=True)
+    missing = {f: url for f, url in REQUIRED_FILES.items() if not (data_dir / f).exists()}
+    if not missing:
+        return
+
+    print(f"Downloading {len(missing)} PokeDB file(s) to {data_dir}...")
+    for filename, url in missing.items():
+        dest = data_dir / filename
+        print(f"  {filename}...", end="", flush=True)
+        try:
+            urllib.request.urlretrieve(url, dest)
+            size_mb = dest.stat().st_size / (1024 * 1024)
+            print(f" {size_mb:.1f} MB")
+        except Exception as e:
+            print(f" FAILED", file=sys.stderr)
+            print(f"Error downloading {url}: {e}", file=sys.stderr)
+            sys.exit(1)
+    print()
+
+
+def load_pokedb_data(data_dir: Path) -> PokeDBData:
+    """Load all PokeDB JSON export files from a directory.
+
+    Downloads any missing files automatically, then validates and loads them.
+    """
+    download_pokedb_data(data_dir)
+
+    missing = [f for f in REQUIRED_FILES if not (data_dir / f).exists()]
+    if missing:
+        print(f"Error: Still missing files after download: {missing}", file=sys.stderr)
+        sys.exit(1)
+
+    def _load(filename: str) -> list[dict[str, Any]]:
+        path = data_dir / filename
+        try:
+            with open(path) as f:
+                data = json.load(f)
+        except json.JSONDecodeError as e:
+            print(f"Error: Failed to parse {path}: {e}", file=sys.stderr)
+            sys.exit(1)
+
+        if not isinstance(data, list):
+            print(
+                f"Error: Expected a JSON array in {path}, got {type(data).__name__}",
+                file=sys.stderr,
+            )
+            sys.exit(1)
+
+        return data
+
+    return PokeDBData(
+        encounters=_load("encounters.json"),
+        locations=_load("locations.json"),
+        location_areas=_load("location_areas.json"),
+        encounter_methods=_load("encounter_methods.json"),
+        versions=_load("versions.json"),
+        pokemon_forms=_load("pokemon_forms.json"),
+    )
+
+
+class SeedConfig:
+    """Container for existing seed configuration files."""
+
+    def __init__(
+        self,
+        version_groups: dict[str, Any],
+        route_order: dict[str, list[str]],
+        special_encounters: dict[str, Any] | None,
+    ) -> None:
+        self.version_groups = version_groups
+        self.route_order = route_order
+        self.special_encounters = special_encounters
+
+
+def load_seed_config(seeds_dir: Path) -> SeedConfig:
+    """Load existing seed configuration files (version_groups, route_order, etc.).
+
+    Exits with an error message if required config files are missing.
+    """
+    vg_path = seeds_dir / "version_groups.json"
+    if not vg_path.exists():
+        print(f"Error: version_groups.json not found at {vg_path}", file=sys.stderr)
+        sys.exit(1)
+
+    with open(vg_path) as f:
+        version_groups = json.load(f)
+
+    # Load route_order.json and resolve aliases
+    ro_path = seeds_dir / "route_order.json"
+    if not ro_path.exists():
+        print(f"Error: route_order.json not found at {ro_path}", file=sys.stderr)
+        sys.exit(1)
+
+    with open(ro_path) as f:
+        ro_raw = json.load(f)
+
+    route_order: dict[str, list[str]] = dict(ro_raw.get("routes", {}))
+    for alias, target in ro_raw.get("aliases", {}).items():
+        if target in route_order:
+            route_order[alias] = route_order[target]
+
+    # Load special_encounters.json (optional)
+    se_path = seeds_dir / "special_encounters.json"
+    special_encounters = None
+    if se_path.exists():
+        with open(se_path) as f:
+            special_encounters = json.load(f)
+
+    return SeedConfig(
+        version_groups=version_groups,
+        route_order=route_order,
+        special_encounters=special_encounters,
+    )

tools/import-pokedb/import_pokedb/mappings.py

@@ -0,0 +1,683 @@
+"""Reference data mappings: PokeDB identifiers → seed format values."""
+
+from __future__ import annotations
+
+import json
+import re
+import sys
+from pathlib import Path
+from typing import Any
+
+from .loader import PokeDBData
+
+
+# ---------------------------------------------------------------------------
+# Encounter method mapping
+# ---------------------------------------------------------------------------
+
+# PokeDB encounter_method_identifier → our simplified method name.
+# Keys can be exact matches or prefix patterns (ending with *).
+ENCOUNTER_METHOD_MAP: dict[str, str] = {
+    # Walking / grass / cave
+    "walking-tall-grass": "walk",
+    "walking-long-grass": "walk",
+    "walking-cave": "walk",
+    "walking-bridge": "walk",
+    "walking-building": "walk",
+    "walking-sand": "walk",
+    "walking-snow": "walk",
+    "walking-rough-terrain": "walk",
+    "walking-marsh": "walk",
+    "walking-puddle": "walk",
+    "walking-flower-field": "walk",
+    "walking-ice": "walk",
+    "walking-forest": "walk",
+    "walking-snowfield": "walk",
+    "dark-grass": "walk",
+    "shaking-grass": "walk",
+    "rustling-grass": "walk",
+    "yellow-flowers": "walk",
+    "red-flowers": "walk",
+    "purple-flowers": "walk",
+    # Surfing
+    "surfing": "surf",
+    "surfing-ocean": "surf",
+    "surfing-puddle": "surf",
+    "surfing-rapids": "surf",
+    "surfing-underwater": "surf",
+    "rippling-water": "surf",
+    # Fishing
+    "fishing-old-rod": "old-rod",
+    "fishing-good-rod": "good-rod",
+    "fishing-super-rod": "super-rod",
+    "fishing": "fishing",
+    "fishing-special": "fishing",
+    # Rock smash
+    "rock-smash": "rock-smash",
+    # Headbutt
+    "headbutt-low": "headbutt",
+    "headbutt-normal": "headbutt",
+    "headbutt-high": "headbutt",
+    # Gift / special acquisition
+    "npc-gift": "gift",
+    "egg": "gift",
+    "revive": "gift",
+    "fossil": "gift",
+    # Trade
+    "npc-trade": "trade",
+    # Overworld / symbol encounters (Gen 8+)
+    "symbol-encounter": "walk",
+    "wanderer": "walk",
+    "flying": "walk",
+    # Static / fixed
+    "fixed-encounter": "static",
+    "static-encounter": "static",
+    "legendary-encounter": "static",
+    "interactable": "static",
+    # Special methods
+    "swarm": "swarm",
+    "poke-radar": "pokeradar",
+    "dual-slot-mode": "dual-slot",
+    "honey-tree": "honey",
+    "trophy-garden": "walk",
+    "great-marsh": "walk",
+    "cave-spot": "walk",
+    "bubble-spot": "surf",
+    "sand-spot": "walk",
+    "horde": "walk",
+    "sos-encounter": "walk",
+    "ambush": "walk",
+    # Seaweed / diving
+    "diving": "surf",
+    "diving-seaweed": "surf",
+    "seaweed": "surf",
+    # Raids
+    "max-raid": "raid",
+    "max-raid-battle": "raid",
+    "dynamax-adventure": "raid",
+    "tera-raid": "raid",
+    "tera-raid-battle": "raid",
+    "fixed-tera-encounter": "static",
+    # Misc
+    "roaming": "roaming",
+    "safari-zone": "walk",
+    "bug-contest": "walk",
+    "dust-cloud": "walk",
+    "hidden-grotto": "static",
+    "hidden-encounter": "walk",
+    "horde-encounter": "walk",
+    "shaking-trees": "walk",
+    "shaking-ore-deposits": "walk",
+    "island-scan": "static",
+    "mass-outbreak": "swarm",
+    "npc-buy": "gift",
+    "special-encounter": "static",
+    "sea-skim": "surf",
+    "midair": "walk",
+    "mr-backlot": "walk",
+    "hoenn-sound": "walk",
+    "sinnoh-sound": "walk",
+    "curry": "gift",
+    "boxes": "gift",
+    "berry-tree": "walk",
+    "zygarde-cube-assemble": "static",
+    "contact-flock": "walk",
+    "contact-space-time-distortion": "walk",
+    "contact-unown-reasearch-notes": "static",
+    "flying-pokemon-shadow": "walk",
+}
+
+# Prefix-based fallbacks for methods not explicitly listed above.
+_METHOD_PREFIX_MAP: list[tuple[str, str]] = [
+    ("walking-", "walk"),
+    ("surfing-", "surf"),
+    ("fishing-", "fishing"),
+    ("headbutt-", "headbutt"),
+    ("flying-", "walk"),
+    ("ambush-", "walk"),
+    ("contact-", "walk"),
+]
+
+
+def map_encounter_method(method_identifier: str) -> str | None:
+    """Map a PokeDB encounter method to our simplified method name.
+
+    Returns None if the method is unrecognized.
+    """
+    if method_identifier in ENCOUNTER_METHOD_MAP:
+        return ENCOUNTER_METHOD_MAP[method_identifier]
+
+    for prefix, mapped in _METHOD_PREFIX_MAP:
+        if method_identifier.startswith(prefix):
+            return mapped
+
+    return None
+
+
+# ---------------------------------------------------------------------------
+# Version mapping
+# ---------------------------------------------------------------------------
+
+# PokeDB version identifiers that differ from our game slugs.
+# Most are 1:1, these handle exceptions.
+_VERSION_OVERRIDES: dict[str, str] = {
+    "lets-go-pikachu": "lets-go-pikachu",
+    "lets-go-eevee": "lets-go-eevee",
+}
+
+
+def build_version_map(
+    pokedb: PokeDBData,
+    version_groups: dict[str, Any],
+) -> dict[str, str]:
+    """Build a mapping from PokeDB version_identifier → our game slug.
+
+    Returns the mapping dict. Logs warnings for unmapped versions.
+    """
+    # Collect all our known game slugs
+    our_slugs: set[str] = set()
+    for vg in version_groups.values():
+        for slug in vg.get("versions", []):
+            our_slugs.add(slug)
+
+    # Collect all PokeDB version identifiers
+    pokedb_versions: set[str] = set()
+    for v in pokedb.versions:
+        identifier = v.get("identifier", "")
+        if identifier:
+            pokedb_versions.add(identifier)
+
+    mapping: dict[str, str] = {}
+
+    for pdb_ver in sorted(pokedb_versions):
+        if pdb_ver in _VERSION_OVERRIDES:
+            mapping[pdb_ver] = _VERSION_OVERRIDES[pdb_ver]
+        elif pdb_ver in our_slugs:
+            mapping[pdb_ver] = pdb_ver
+        # else: PokeDB version not in our version_groups (expected for some)
+
+    # Report our games that have no PokeDB mapping
+    mapped_slugs = set(mapping.values())
+    unmapped_ours = our_slugs - mapped_slugs
+    if unmapped_ours:
+        print(f"  Versions in our config with no PokeDB match: {sorted(unmapped_ours)}")
+
+    return mapping
+
+
+# ---------------------------------------------------------------------------
+# Pokemon form mapping
+# ---------------------------------------------------------------------------
+
+
+# PokeDB uses adjectival region forms ("alolan") while PokeAPI/our data uses
+# region names ("alola"). This maps PokeDB suffixes → our suffixes.
+_FORM_SUFFIX_MAP: dict[str, str] = {
+    "alolan": "alola",
+    "galarian": "galar",
+    "hisuian": "hisui",
+    "paldean": "paldea",
+    # Totem forms
+    "alolan-totem": "totem-alola",
+    # Basculin stripes
+    "blue-stripe": "blue-striped",
+    "red-stripe": "red-striped",
+    "white-stripe": "white-striped",
+    # Sea forms
+    "west-sea": "west",
+    "east-sea": "east",
+    # Cloak forms
+    "plant-cloak": "plant",
+    "sandy-cloak": "sandy",
+    "trash-cloak": "trash",
+    # Eiscue
+    "ice-face": "ice",
+    # Misc forms
+    "pompom": "pom-pom",
+    "10p": "10",
+    "50p": "50",
+    "owntempo": "own-tempo",
+    "two": "two-segment",
+    "chest": "chest-form",
+    "ice-rider": "ice",
+    "shadow-rider": "shadow",
+    "apex": "apex-build",
+    "ultimate": "ultimate-mode",
+    "black-activated": "black",
+    "white-activated": "white",
+    "hero": "hero",
+    "sword": "crowned",
+    "shield": "crowned",
+    # Gigantamax
+    "gigantamax": "gmax",
+    # Partner forms
+    "partner": "partner-cap",
+    # Flabébé / Floette / Florges color forms — these don't have form suffixes in our data
+    # since each color is just the base form. Map to base.
+    "blue": "blue",
+    "orange": "orange",
+    "red": "red",
+    "white": "white",
+    "yellow": "yellow",
+    # Gender forms
+    "female": "female",
+    "male": "male",
+    # Furfrou
+    "natural": "natural",
+    # Cherrim
+    "overcast": "overcast",
+    # Sinistea / Polteageist
+    "antique": "antique",
+    "phony": "phony",
+    # Poltchageist / Sinistcha
+    "artisan": "artisan",
+    "counterfeit": "counterfeit",
+    "masterpiece": "masterpiece",
+    "unremarkable": "unremarkable",
+    # Minior cores
+    "blue-core": "blue",
+    "green-core": "green",
+    "indigo-core": "indigo",
+    "orange-core": "orange",
+    "red-core": "red",
+    "violet-core": "violet",
+    "yellow-core": "yellow",
+    # Vivillon
+    "fancy": "fancy",
+    # Squawkabilly
+    # these use same name
+    # Xerneas
+    "neutral": "neutral",
+    # Deerling / Sawsbuck
+    "spring": "spring",
+    "summer": "summer",
+    "autumn": "autumn",
+    "winter": "winter",
+    # Spiky-ears Pichu
+    "spiky-ears": "spiky-eared",
+    # Paldean breeds
+    "paldean-combat-breed": "paldea-combat-breed",
+    "paldean-blaze-breed": "paldea-blaze-breed",
+    "paldean-aqua-breed": "paldea-aqua-breed",
+}
+
+
+# PokeDB type IDs → type names (from PokeDB's type system)
+TYPE_ID_MAP: dict[int, str] = {
+    1: "normal",
+    2: "fighting",
+    3: "flying",
+    4: "poison",
+    5: "ground",
+    6: "rock",
+    7: "bug",
+    8: "ghost",
+    9: "steel",
+    10: "fire",
+    11: "water",
+    12: "grass",
+    13: "electric",
+    14: "psychic",
+    15: "ice",
+    16: "dragon",
+    17: "dark",
+    18: "fairy",
+}
+
+
+def _normalize_slug(identifier: str) -> str:
+    """Normalize a PokeDB pokemon_form_identifier to a PokeAPI-style slug.
+
+    PokeDB uses "pidgey-default" for base forms — strip the "-default" suffix.
+    For alternate forms, translate PokeDB naming conventions to ours.
+    """
+    if identifier.endswith("-default"):
+        return identifier[: -len("-default")]
+
+    # Try suffix-based mapping: split into species + form suffix
+    # e.g. "rattata-alolan" → species="rattata", suffix="alolan"
+    # e.g. "mr-mime-galarian" → need to find the right split point
+    # Strategy: try longest suffix first
+    for pokedb_suffix, our_suffix in sorted(
+        _FORM_SUFFIX_MAP.items(), key=lambda x: -len(x[0])
+    ):
+        if identifier.endswith("-" + pokedb_suffix):
+            species = identifier[: -(len(pokedb_suffix) + 1)]
+            return f"{species}-{our_suffix}"
+
+    return identifier
+
+
+def _name_to_slug(name: str) -> str:
+    """Convert a display name to a PokeAPI-style slug.
+
+    "Bulbasaur" → "bulbasaur"
+    "Mr. Mime" → "mr-mime"
+    "Farfetch'd" → "farfetchd"
+    "Nidoran♀" → "nidoran-f"
+    "Nidoran♂" → "nidoran-m"
+    "Flabébé" → "flabebe"
+    "Type: Null" → "type-null"
+    """
+    s = name.lower()
+    s = s.replace("♀", "-f").replace("♂", "-m")
+    s = s.replace("'", "").replace("'", "").replace(".", "").replace(":", "")
+    s = s.replace("é", "e").replace("É", "e")
+    s = s.replace(" ", "-")
+    # Collapse multiple hyphens
+    s = re.sub(r"-+", "-", s)
+    return s.strip("-")
+
+
+def _name_to_form_slug(name: str) -> str | None:
+    """Convert a display name with form suffix to a PokeAPI-style slug.
+
+    "Rattata (Alola)" → "rattata-alola"
+    "Basculin (Blue Striped)" → "basculin-blue-striped"
+    "Deoxys Normal" → "deoxys-normal"  (space-separated variant)
+    """
+    # Try parenthesized form: "Base (Suffix)"
+    m = re.match(r"^(.+?)\s*\((.+)\)$", name)
+    if m:
+        base = _name_to_slug(m.group(1))
+        suffix = _name_to_slug(m.group(2))
+        return f"{base}-{suffix}"
+
+    # Try space-separated form: "Deoxys Normal"
+    parts = name.split()
+    if len(parts) >= 2:
+        return _name_to_slug(name)
+
+    return None
+
+
+# Manual overrides for PokeDB identifiers that can't be resolved generically.
+# These are cases where our pokemon.json uses non-standard base form names
+# (e.g. "Deoxys Normal" instead of "Deoxys").
+_FORM_OVERRIDES: dict[str, tuple[int, str]] = {
+    "deoxys-default": (386, "Deoxys Normal"),
+    "darmanitan-galarian": (10177, "Darmanitan (Galar Standard)"),
+    "mimikyu-totem": (10144, "Mimikyu (Totem Disguised)"),
+    "squawkabilly-green": (931, "Squawkabilly Green Plumage"),
+    "squawkabilly-blue": (10260, "Squawkabilly (Blue Plumage)"),
+    "squawkabilly-white": (10262, "Squawkabilly (White Plumage)"),
+    "squawkabilly-yellow": (10261, "Squawkabilly (Yellow Plumage)"),
+    "toxtricity-gigantamax": (849, "Toxtricity Amped"),
+}
+
+
+class PokemonMapper:
+    """Maps PokeDB pokemon_form_identifier → (pokeapi_id, display_name)."""
+
+    def __init__(self, pokemon_json_path: Path, pokedb: PokeDBData) -> None:
+        # Build slug → (pokeapi_id, name) from existing pokemon.json
+        self._slug_to_info: dict[str, tuple[int, str]] = {}
+        self._id_to_info: dict[int, tuple[int, str]] = {}  # pokeapi_id → (national_dex, name)
+        self._existing_types: dict[int, list[str]] = {}  # pokeapi_id → types (fallback)
+        self._unmapped: set[str] = set()
+
+        if pokemon_json_path.exists():
+            with open(pokemon_json_path) as f:
+                pokemon_list = json.load(f)
+
+            for p in pokemon_list:
+                pid = p["pokeapi_id"]
+                name = p["name"]
+                ndex = p["national_dex"]
+                self._id_to_info[pid] = (ndex, name)
+                if p.get("types"):
+                    self._existing_types[pid] = p["types"]
+
+                # Index by base slug (from pokeapi_id for base forms)
+                slug = _name_to_slug(name)
+                self._slug_to_info[slug] = (pid, name)
+
+                # Also index by form slug if it has a form suffix
+                form_slug = _name_to_form_slug(name)
+                if form_slug and form_slug != slug:
+                    self._slug_to_info[form_slug] = (pid, name)
+
+        # Build index from PokeDB pokemon_forms.json if it has useful fields
+        self._pokedb_form_index: dict[str, dict] = {}
+        # Reverse index: pokeapi_id → PokeDB form record (for non-encountered lookups)
+        self._id_to_pokedb_form: dict[int, dict] = {}
+        for form in pokedb.pokemon_forms:
+            identifier = form.get("identifier", "")
+            if identifier:
+                self._pokedb_form_index[identifier] = form
+
+        # Build reverse index from pokeapi_id → PokeDB form
+        # First, for all encountered lookups that succeed, we cache the mapping.
+        # Here we pre-build for default forms using ndex_id.
+        for form in pokedb.pokemon_forms:
+            ndex = form.get("ndex_id")
+            if ndex and form.get("is_default_form"):
+                # Default form matches the base species (ndex == pokeapi_id for base forms)
+                if ndex in self._id_to_info:
+                    self._id_to_pokedb_form[ndex] = form
+                # Also look for alternate-form pokeapi_ids that share the same ndex
+                for pid, (p_ndex, _) in self._id_to_info.items():
+                    if p_ndex == ndex and pid not in self._id_to_pokedb_form:
+                        self._id_to_pokedb_form[pid] = form
+
+        # Map non-default forms to their specific pokeapi_ids where possible
+        for form in pokedb.pokemon_forms:
+            identifier = form.get("identifier", "")
+            if not identifier or form.get("is_default_form"):
+                continue
+            slug = _normalize_slug(identifier)
+            if slug in self._slug_to_info:
+                pid, _ = self._slug_to_info[slug]
+                self._id_to_pokedb_form[pid] = form
+
+    def lookup(self, pokemon_form_identifier: str | None) -> tuple[int, str] | None:
+        """Look up a PokeDB pokemon_form_identifier.
+
+        Returns (pokeapi_id, display_name) or None if unmapped.
+        """
+        if not pokemon_form_identifier:
+            return None
+
+        # Check manual overrides first
+        if pokemon_form_identifier in _FORM_OVERRIDES:
+            return _FORM_OVERRIDES[pokemon_form_identifier]
+
+        slug = _normalize_slug(pokemon_form_identifier)
+
+        # Direct slug match
+        if slug in self._slug_to_info:
+            return self._slug_to_info[slug]
+
+        # Try the PokeDB form record for a pokemon_id field
+        form_record = self._pokedb_form_index.get(pokemon_form_identifier, {})
+        pokemon_id = form_record.get("pokemon_id")
+        if pokemon_id and pokemon_id in self._id_to_info:
+            ndex, name = self._id_to_info[pokemon_id]
+            # Cache for future lookups
+            self._slug_to_info[slug] = (pokemon_id, name)
+            return (pokemon_id, name)
+
+        # Fallback: strip form suffix to find base species.
+        # Many cosmetic forms (colors, genders, seasons) don't have separate
+        # entries in our pokemon.json — they use the base species entry.
+        # Try progressively shorter slugs: "flabebe-blue" → "flabebe"
+        parts = slug.split("-")
+        for i in range(len(parts) - 1, 0, -1):
+            base = "-".join(parts[:i])
+            if base in self._slug_to_info:
+                result = self._slug_to_info[base]
+                # Cache for future lookups
+                self._slug_to_info[slug] = result
+                return result
+
+        # Track unmapped
+        if pokemon_form_identifier not in self._unmapped:
+            self._unmapped.add(pokemon_form_identifier)
+
+        return None
+
+    def lookup_by_id(self, pokeapi_id: int) -> tuple[int, str] | None:
+        """Look up a pokemon by its pokeapi_id.
+
+        Returns (pokeapi_id, display_name) or None if not found.
+        """
+        if pokeapi_id in self._id_to_info:
+            _, name = self._id_to_info[pokeapi_id]
+            return (pokeapi_id, name)
+        return None
+
+    def get_sprite_url(self, pokemon_form_identifier: str | None) -> str | None:
+        """Get the PokeDB CDN sprite URL (100x100 medium) for a form identifier."""
+        if not pokemon_form_identifier:
+            return None
+        form_record = self._pokedb_form_index.get(pokemon_form_identifier, {})
+        return form_record.get("main_image_normal_path_medium")
+
+    def get_form_data(self, pokemon_form_identifier: str | None) -> dict | None:
+        """Get the full PokeDB form record for a form identifier."""
+        if not pokemon_form_identifier:
+            return None
+        return self._pokedb_form_index.get(pokemon_form_identifier)
+
+    def all_pokemon(self) -> list[tuple[int, tuple[int, str]]]:
+        """Return all known pokemon as [(pokeapi_id, (national_dex, name)), ...].
+
+        Sourced from the existing pokemon.json.
+        """
+        return sorted(self._id_to_info.items())
+
+    def get_types_for_id(self, pokeapi_id: int) -> list[str]:
+        """Get types for a pokemon by pokeapi_id, looking up via PokeDB form data.
+
+        Falls back to existing types from pokemon.json if no PokeDB form found.
+        """
+        form = self._find_form_for_id(pokeapi_id)
+        if form:
+            types = []
+            t1 = form.get("type_1_id")
+            t2 = form.get("type_2_id")
+            if t1 and t1 in TYPE_ID_MAP:
+                types.append(TYPE_ID_MAP[t1])
+            if t2 and t2 in TYPE_ID_MAP:
+                types.append(TYPE_ID_MAP[t2])
+            if types:
+                return types
+        # Fallback to existing types from pokemon.json
+        return self._existing_types.get(pokeapi_id, [])
+
+    def _find_form_for_id(self, pokeapi_id: int) -> dict | None:
+        """Find the PokeDB form record for a pokeapi_id."""
+        # Check pre-built reverse index first
+        if pokeapi_id in self._id_to_pokedb_form:
+            return self._id_to_pokedb_form[pokeapi_id]
+
+        if pokeapi_id not in self._id_to_info:
+            return None
+        _, name = self._id_to_info[pokeapi_id]
+        slug = _name_to_slug(name)
+        for suffix in ["-default", ""]:
+            candidate = slug + suffix
+            if candidate in self._pokedb_form_index:
+                return self._pokedb_form_index[candidate]
+        form_slug = _name_to_form_slug(name)
+        if form_slug:
+            for suffix in ["-default", ""]:
+                candidate = form_slug + suffix
+                if candidate in self._pokedb_form_index:
+                    return self._pokedb_form_index[candidate]
+        return None
+
+    def has_sprite_for_id(self, pokeapi_id: int) -> bool:
+        """Check if a sprite exists for a pokemon by pokeapi_id."""
+        form = self._find_form_for_id(pokeapi_id)
+        return bool(form and form.get("main_image_normal_path_medium"))
+
+    def get_sprite_url_for_id(self, pokeapi_id: int) -> str | None:
+        """Get the PokeDB CDN sprite URL for a pokemon by pokeapi_id."""
+        form = self._find_form_for_id(pokeapi_id)
+        return form.get("main_image_normal_path_medium") if form else None
+
+    def report_unmapped(self) -> None:
+        """Print warnings for any unmapped identifiers."""
+        if self._unmapped:
+            print(
+                f"\nWarning: {len(self._unmapped)} unmapped pokemon form identifiers:",
+                file=sys.stderr,
+            )
+            for ident in sorted(self._unmapped):
+                print(f"  - {ident}", file=sys.stderr)
+
+
+# ---------------------------------------------------------------------------
+# Location area mapping
+# ---------------------------------------------------------------------------
+
+# Region prefixes to strip from location identifiers (matching Go tool behavior).
+_REGION_PREFIXES = [
+    "kanto-", "johto-", "hoenn-", "sinnoh-",
+    "unova-", "kalos-", "alola-", "galar-",
+    "hisui-", "paldea-",
+]
+
+
+def _identifier_to_name(identifier: str) -> str:
+    """Convert a hyphenated identifier to a Title Case display name.
+
+    "route-01-kanto" → "Route 01 Kanto"  (region stripping done separately)
+    "viridian-forest" → "Viridian Forest"
+    """
+    return identifier.replace("-", " ").title()
+
+
+class LocationMapper:
+    """Maps PokeDB location_area_identifier → (location_name, area_suffix)."""
+
+    def __init__(self, pokedb: PokeDBData) -> None:
+        # Build location_area_identifier → location_identifier lookup
+        self._area_to_location: dict[str, str] = {}
+        # location_identifier → location display name
+        self._location_names: dict[str, str] = {}
+        # location_area_identifier → area display name
+        self._area_names: dict[str, str] = {}
+
+        # Index locations
+        for loc in pokedb.locations:
+            identifier = loc.get("identifier", "")
+            name = loc.get("name", "")
+            if identifier:
+                self._location_names[identifier] = name if name else self._clean_location_name(identifier)
+
+        # Index location areas
+        for area in pokedb.location_areas:
+            area_id = area.get("identifier", "")
+            loc_id = area.get("location_identifier", "")
+            area_name = area.get("name", "")
+            if area_id:
+                self._area_to_location[area_id] = loc_id
+                self._area_names[area_id] = area_name if area_name else ""
+
+    @staticmethod
+    def _clean_location_name(identifier: str) -> str:
+        """Clean a location identifier into a display name."""
+        name = identifier
+        for prefix in _REGION_PREFIXES:
+            if name.startswith(prefix):
+                name = name[len(prefix):]
+                break
+        return _identifier_to_name(name)
+
+    def get_location_name(self, location_area_identifier: str) -> str:
+        """Get the display name for a location area's parent location."""
+        loc_id = self._area_to_location.get(location_area_identifier, "")
+        if loc_id and loc_id in self._location_names:
+            return self._location_names[loc_id]
+        # Fallback: derive from the area identifier itself
+        return self._clean_location_name(location_area_identifier)
+
+    def get_area_name(self, location_area_identifier: str) -> str:
+        """Get the display name for a specific location area."""
+        return self._area_names.get(location_area_identifier, "")
+
+    def get_location_identifier(self, location_area_identifier: str) -> str:
+        """Get the parent location identifier for a location area."""
+        return self._area_to_location.get(location_area_identifier, "")

tools/import-pokedb/import_pokedb/models.py

@@ -0,0 +1,81 @@
+"""Output data models matching the existing seed JSON format."""
+
+from __future__ import annotations
+
+from dataclasses import dataclass, field
+
+
+@dataclass
+class Encounter:
+    pokeapi_id: int
+    pokemon_name: str
+    method: str
+    encounter_rate: int
+    min_level: int
+    max_level: int
+
+    def to_dict(self) -> dict:
+        return {
+            "pokeapi_id": self.pokeapi_id,
+            "pokemon_name": self.pokemon_name,
+            "method": self.method,
+            "encounter_rate": self.encounter_rate,
+            "min_level": self.min_level,
+            "max_level": self.max_level,
+        }
+
+
+@dataclass
+class Route:
+    name: str
+    order: int
+    encounters: list[Encounter] = field(default_factory=list)
+    children: list[Route] = field(default_factory=list)
+
+    def to_dict(self) -> dict:
+        d: dict = {
+            "name": self.name,
+            "order": self.order,
+            "encounters": [e.to_dict() for e in self.encounters],
+        }
+        if self.children:
+            d["children"] = [c.to_dict() for c in self.children]
+        return d
+
+
+@dataclass
+class Game:
+    name: str
+    slug: str
+    generation: int
+    region: str
+    release_year: int
+    color: str | None = None
+
+    def to_dict(self) -> dict:
+        return {
+            "name": self.name,
+            "slug": self.slug,
+            "generation": self.generation,
+            "region": self.region,
+            "release_year": self.release_year,
+            "color": self.color,
+        }
+
+
+@dataclass
+class Pokemon:
+    pokeapi_id: int
+    national_dex: int
+    name: str
+    types: list[str]
+    sprite_url: str
+
+    def to_dict(self) -> dict:
+        return {
+            "pokeapi_id": self.pokeapi_id,
+            "national_dex": self.national_dex,
+            "name": self.name,
+            "types": self.types,
+            "sprite_url": self.sprite_url,
+        }

tools/import-pokedb/import_pokedb/output.py

@@ -0,0 +1,289 @@
+"""Output seed JSON files in the existing format."""
+
+from __future__ import annotations
+
+import json
+import re
+import sys
+from pathlib import Path
+from typing import Any
+
+from .loader import SeedConfig
+from .mappings import TYPE_ID_MAP, PokemonMapper
+from .models import Encounter, Route
+from .sprites import sprite_path_for_pokemon
+
+# Max route name length (matches DB column VARCHAR(100))
+_MAX_ROUTE_NAME_LEN = 100
+
+# Pattern for Sw/Sh den area names: "Location (Den X - long description - Common/Rare)"
+_DEN_NAME_RE = re.compile(r"^(.+?) \(Den ([A-Z]\d*) - .+ - (Common|Rare)\)$")
+
+
+def _truncate_route_name(name: str) -> str:
+    """Truncate a route name to fit the database column limit.
+
+    Applies smart truncation for known patterns (e.g. Sw/Sh den descriptions).
+    """
+    if len(name) <= _MAX_ROUTE_NAME_LEN:
+        return name
+
+    # Sw/Sh dens: shorten "Location (Den X - long desc - Common/Rare)" → "Location (Den X - Common/Rare)"
+    m = _DEN_NAME_RE.match(name)
+    if m:
+        shortened = f"{m.group(1)} (Den {m.group(2)} - {m.group(3)})"
+        if len(shortened) <= _MAX_ROUTE_NAME_LEN:
+            return shortened
+
+    # Generic truncation: cut at last space before limit, add ellipsis
+    truncated = name[:_MAX_ROUTE_NAME_LEN - 1].rsplit(" ", 1)[0] + "…"
+    return truncated
+
+
+# ---------------------------------------------------------------------------
+# Route ordering
+# ---------------------------------------------------------------------------
+
+def _get_route_order(config: SeedConfig, vg_key: str) -> list[str] | None:
+    """Get the route order list for a version group, resolving aliases."""
+    return config.route_order.get(vg_key)
+
+
+def _route_sort_key(name: str, order_list: list[str]) -> tuple[int, str]:
+    """Compute sort key for a route name against an ordered list."""
+    for i, ordered_name in enumerate(order_list):
+        if name == ordered_name or name.startswith(ordered_name + " ("):
+            return (i, name)
+    return (len(order_list), name)
+
+
+def sort_routes(routes: list[Route], config: SeedConfig, vg_key: str) -> list[Route]:
+    """Sort routes by game progression order and assign sequential order values."""
+    order_list = _get_route_order(config, vg_key)
+    if order_list:
+        routes.sort(key=lambda r: _route_sort_key(r.name, order_list))
+    else:
+        print(f"  Warning: No route order for {vg_key}, using default order", file=sys.stderr)
+
+    # Assign sequential order values
+    order = 1
+    for route in routes:
+        route.order = order
+        order += 1
+        for child in route.children:
+            child.order = order
+            order += 1
+
+    return routes
+
+
+# ---------------------------------------------------------------------------
+# Special encounters
+# ---------------------------------------------------------------------------
+
+def _get_special_encounters(
+    config: SeedConfig,
+    vg_key: str,
+) -> dict[str, list[dict[str, Any]]] | None:
+    """Get special encounters for a version group, resolving aliases."""
+    if not config.special_encounters:
+        return None
+
+    encounters = config.special_encounters.get("encounters", {})
+    aliases = config.special_encounters.get("aliases", {})
+
+    if vg_key in encounters:
+        return encounters[vg_key]
+    if vg_key in aliases:
+        alias_target = aliases[vg_key]
+        if alias_target in encounters:
+            return encounters[alias_target]
+
+    return None
+
+
+def merge_special_encounters(
+    routes: list[Route],
+    config: SeedConfig,
+    vg_key: str,
+    pokemon_mapper: PokemonMapper | None = None,
+) -> list[Route]:
+    """Merge special encounters (starters, gifts, fossils) into routes."""
+    special_data = _get_special_encounters(config, vg_key)
+    if not special_data:
+        return routes
+
+    # Build lookup: route name → route (including children)
+    route_map: dict[str, Route] = {}
+    for route in routes:
+        route_map[route.name] = route
+        for child in route.children:
+            route_map[child.name] = child
+
+    for location_name, encounter_dicts in special_data.items():
+        encounters = []
+        for e in encounter_dicts:
+            # Look up proper display name from pokemon mapper if available
+            pokemon_name = e["pokemon_name"]
+            if pokemon_mapper:
+                info = pokemon_mapper.lookup_by_id(e["pokeapi_id"])
+                if info:
+                    pokemon_name = info[1]
+
+            encounters.append(Encounter(
+                pokeapi_id=e["pokeapi_id"],
+                pokemon_name=pokemon_name,
+                method=e["method"],
+                encounter_rate=e["encounter_rate"],
+                min_level=e["min_level"],
+                max_level=e["max_level"],
+            ))
+
+        if location_name in route_map:
+            route_map[location_name].encounters.extend(encounters)
+        else:
+            new_route = Route(name=location_name, order=0, encounters=encounters)
+            routes.append(new_route)
+            route_map[location_name] = new_route
+
+    return routes
+
+
+# ---------------------------------------------------------------------------
+# JSON output
+# ---------------------------------------------------------------------------
+
+def write_json(path: Path, data: Any) -> None:
+    """Write data as formatted JSON with trailing newline."""
+    content = json.dumps(data, indent=2, ensure_ascii=False)
+    path.write_text(content + "\n", encoding="utf-8")
+    print(f"  -> {path}")
+
+
+def _deduplicate_names(routes: list[Route]) -> None:
+    """Ensure all route names are unique by appending a numeric suffix to duplicates."""
+    seen: dict[str, int] = {}
+
+    def _unique(name: str) -> str:
+        if name not in seen:
+            seen[name] = 1
+            return name
+        seen[name] += 1
+        return f"{name} #{seen[name]}"
+
+    for route in routes:
+        route.name = _unique(_truncate_route_name(route.name))
+        for child in route.children:
+            child.name = _unique(_truncate_route_name(child.name))
+
+
+def write_game_json(routes: list[Route], output_dir: Path, game_slug: str) -> None:
+    """Write a per-game route/encounter JSON file."""
+    _deduplicate_names(routes)
+    data = [r.to_dict() for r in routes]
+    write_json(output_dir / f"{game_slug}.json", data)
+
+
+_GAME_CATEGORY: dict[str, str] = {
+    "red": "original", "blue": "original", "yellow": "enhanced",
+    "gold": "original", "silver": "original", "crystal": "enhanced",
+    "ruby": "original", "sapphire": "original", "emerald": "enhanced",
+    "firered": "remake", "leafgreen": "remake",
+    "diamond": "original", "pearl": "original", "platinum": "enhanced",
+    "heartgold": "remake", "soulsilver": "remake",
+    "black": "original", "white": "original",
+    "black-2": "sequel", "white-2": "sequel",
+    "x": "original", "y": "original",
+    "omega-ruby": "remake", "alpha-sapphire": "remake",
+    "sun": "original", "moon": "original",
+    "ultra-sun": "enhanced", "ultra-moon": "enhanced",
+    "lets-go-pikachu": "remake", "lets-go-eevee": "remake",
+    "sword": "original", "shield": "original",
+    "brilliant-diamond": "remake", "shining-pearl": "remake",
+    "legends-arceus": "spinoff",
+    "scarlet": "original", "violet": "original",
+    "legends-z-a": "spinoff",
+}
+
+
+def write_games_json(config: SeedConfig, output_dir: Path) -> None:
+    """Write games.json from version_groups config."""
+    games = []
+    for vg_info in config.version_groups.values():
+        for game_info in vg_info.get("games", {}).values():
+            slug = game_info["slug"]
+            games.append({
+                "name": game_info["name"],
+                "slug": slug,
+                "generation": vg_info["generation"],
+                "region": vg_info["region"],
+                "release_year": game_info["release_year"],
+                "color": game_info.get("color"),
+                "category": _GAME_CATEGORY.get(slug, "original"),
+            })
+    write_json(output_dir / "games.json", games)
+    print(f"  Wrote {len(games)} games")
+
+
+def write_pokemon_json(
+    pokemon_mapper: PokemonMapper,
+    encountered_form_ids: set[str],
+    sprite_map: dict[str, str],
+    output_dir: Path,
+) -> None:
+    """Write pokemon.json with all known pokemon.
+
+    Includes all pokemon from the existing pokemon.json (base data),
+    enriched with PokeDB types and sprite paths for encountered forms.
+    """
+    # Build a mapping of pokeapi_id → (form_id, form_data) for encountered forms
+    encountered_by_id: dict[int, tuple[str, dict[str, Any] | None]] = {}
+    for form_id in encountered_form_ids:
+        info = pokemon_mapper.lookup(form_id)
+        if info is None:
+            continue
+        pokeapi_id, _ = info
+        if pokeapi_id not in encountered_by_id:
+            form_data = pokemon_mapper.get_form_data(form_id)
+            encountered_by_id[pokeapi_id] = (form_id, form_data)
+
+    pokemon_list: list[dict[str, Any]] = []
+
+    for pokeapi_id, (ndex, name) in pokemon_mapper.all_pokemon():
+        # Enrich with PokeDB data if this pokemon was encountered
+        if pokeapi_id in encountered_by_id:
+            form_id, form_data = encountered_by_id[pokeapi_id]
+            types = _extract_types(form_data) if form_data else []
+            sprite_url = sprite_path_for_pokemon(pokeapi_id) if form_id in sprite_map else None
+            national_dex = form_data.get("ndex_id", ndex) if form_data else ndex
+        else:
+            # Not encountered — use existing data, try to find PokeDB form for types
+            types = pokemon_mapper.get_types_for_id(pokeapi_id)
+            sprite_url = sprite_path_for_pokemon(pokeapi_id) if pokemon_mapper.has_sprite_for_id(pokeapi_id) else None
+            national_dex = ndex
+
+        pokemon_list.append({
+            "pokeapi_id": pokeapi_id,
+            "national_dex": national_dex,
+            "name": name,
+            "types": types,
+            "sprite_url": sprite_url,
+        })
+
+    # Sort by pokeapi_id
+    pokemon_list.sort(key=lambda p: p["pokeapi_id"])
+
+    write_json(output_dir / "pokemon.json", pokemon_list)
+    print(f"  Wrote {len(pokemon_list)} pokemon")
+
+
+def _extract_types(form_data: dict[str, Any]) -> list[str]:
+    """Extract type names from a PokeDB form record."""
+    types = []
+    type1_id = form_data.get("type_1_id")
+    type2_id = form_data.get("type_2_id")
+    if type1_id and type1_id in TYPE_ID_MAP:
+        types.append(TYPE_ID_MAP[type1_id])
+    if type2_id and type2_id in TYPE_ID_MAP:
+        types.append(TYPE_ID_MAP[type2_id])
+    return types

tools/import-pokedb/import_pokedb/processing.py

@@ -0,0 +1,343 @@
+"""Core encounter processing: filter, parse, aggregate, and group encounters."""
+
+from __future__ import annotations
+
+import re
+from typing import Any
+
+from .mappings import LocationMapper, PokemonMapper, map_encounter_method
+from .models import Encounter, Route
+
+
+# ---------------------------------------------------------------------------
+# Rate parsing
+# ---------------------------------------------------------------------------
+
+# Word-based rates → numeric value
+_WORD_RATES: dict[str, int] = {
+    "one": 100,
+    "two": 50,
+    "three": 33,
+    "four": 25,
+    "five": 20,
+    "six": 17,
+    "seven": 14,
+    "eight": 13,
+    "choose one": 100,
+    "one of three": 33,
+    "only one": 100,
+    "unlimited": 100,
+    "respawns": 100,
+    "common": 60,
+    "average": 30,
+    "rare": 10,
+    "varies": 50,
+}
+
+_PERCENT_RE = re.compile(r"~?(\d+(?:\.\d+)?)%?")
+
+
+def parse_rate(value: str | None) -> int | None:
+    """Parse a rate string into an integer percentage (0-100).
+
+    Handles formats: "50%", "~10%", "one", "common", "100", "??%", etc.
+    Returns None if unparseable.
+    """
+    if not value:
+        return None
+
+    value = value.strip()
+
+    # Word-based
+    lower = value.lower()
+    if lower in _WORD_RATES:
+        return _WORD_RATES[lower]
+
+    # Unknown
+    if value == "??%":
+        return None
+
+    # Numeric percentage: "50%", "~10%", "10.14%", or bare "100"
+    m = _PERCENT_RE.match(value)
+    if m:
+        return max(1, round(float(m.group(1))))
+
+    return None
+
+
+def extract_encounter_rate(record: dict[str, Any], generation: int) -> int:
+    """Extract a single encounter_rate from a PokeDB encounter record.
+
+    Flattens generation-specific rate variants into a single value.
+    """
+    # Gen 1/3/6: rate_overall
+    rate_overall = parse_rate(record.get("rate_overall"))
+    if rate_overall is not None:
+        return rate_overall
+
+    # Gen 2/4: time-of-day rates — take the max
+    time_rates = [
+        parse_rate(record.get("rate_morning")),
+        parse_rate(record.get("rate_day")),
+        parse_rate(record.get("rate_night")),
+    ]
+    time_rates = [r for r in time_rates if r is not None]
+    if time_rates:
+        return max(time_rates)
+
+    # Gen 5: seasonal rates — take the max
+    season_rates = [
+        parse_rate(record.get("rate_spring")),
+        parse_rate(record.get("rate_summer")),
+        parse_rate(record.get("rate_autumn")),
+        parse_rate(record.get("rate_winter")),
+    ]
+    season_rates = [r for r in season_rates if r is not None]
+    if season_rates:
+        return max(season_rates)
+
+    # Gen 8 Sw/Sh: weather rates — take the max
+    weather_rates = []
+    for key, val in record.items():
+        if key.startswith("weather_") and key.endswith("_rate") and val:
+            parsed = parse_rate(val)
+            if parsed is not None:
+                weather_rates.append(parsed)
+    if weather_rates:
+        return max(weather_rates)
+
+    # Gen 8 Legends Arceus: boolean conditions → presence-based
+    if record.get("during_any_time") or record.get("during_morning") or \
+       record.get("during_day") or record.get("during_evening") or record.get("during_night"):
+        return 100  # Present under conditions
+
+    # Gen 9 Sc/Vi: probability weights → normalize
+    prob_overall = record.get("probability_overall")
+    if prob_overall:
+        parsed = parse_rate(prob_overall)
+        if parsed is not None:
+            # These are spawn weights (e.g. "20", "300"), not percentages.
+            # We'll normalize them later during aggregation when we have
+            # all encounters for a location. For now, store the raw weight.
+            return parsed
+
+    # Check time-based probability variants
+    prob_rates = [
+        parse_rate(record.get("probability_morning")),
+        parse_rate(record.get("probability_day")),
+        parse_rate(record.get("probability_evening")),
+        parse_rate(record.get("probability_night")),
+    ]
+    prob_rates = [r for r in prob_rates if r is not None]
+    if prob_rates:
+        return max(prob_rates)
+
+    # Fallback: gift/trade/static encounters with no rate
+    return 100
+
+
+# ---------------------------------------------------------------------------
+# Level parsing
+# ---------------------------------------------------------------------------
+
+def parse_levels(levels_str: str | None) -> tuple[int, int]:
+    """Parse a level string into (min_level, max_level).
+
+    "2 - 4" → (2, 4)
+    "67" → (67, 67)
+    "44 - 51" → (44, 51)
+    Returns (1, 1) if unparseable.
+    """
+    if not levels_str:
+        return (1, 1)
+
+    levels_str = levels_str.strip()
+
+    # Range: "2 - 4" or "2-4"
+    m = re.match(r"(\d+)\s*-\s*(\d+)", levels_str)
+    if m:
+        return (int(m.group(1)), int(m.group(2)))
+
+    # Single: "67"
+    m = re.match(r"(\d+)", levels_str)
+    if m:
+        level = int(m.group(1))
+        return (level, level)
+
+    return (1, 1)
+
+
+# ---------------------------------------------------------------------------
+# Core processing
+# ---------------------------------------------------------------------------
+
+def filter_encounters_for_game(
+    encounters: list[dict[str, Any]],
+    game_slug: str,
+) -> list[dict[str, Any]]:
+    """Filter PokeDB encounters to only those for a specific game version."""
+    return [
+        e for e in encounters
+        if game_slug in (e.get("version_identifiers") or [])
+    ]
+
+
+def process_encounters(
+    raw_encounters: list[dict[str, Any]],
+    generation: int,
+    pokemon_mapper: PokemonMapper,
+    location_mapper: LocationMapper,
+) -> dict[str, list[Encounter]]:
+    """Process raw PokeDB encounters into grouped-by-location-area Encounter objects.
+
+    Returns {location_area_identifier: [Encounter, ...]}.
+    """
+    by_area: dict[str, list[Encounter]] = {}
+
+    for record in raw_encounters:
+        # Map encounter method
+        method_id = record.get("encounter_method_identifier", "")
+        method = map_encounter_method(method_id) if method_id else None
+        if method is None:
+            continue
+
+        # Map pokemon
+        form_id = record.get("pokemon_form_identifier")
+        pokemon_info = pokemon_mapper.lookup(form_id)
+        if pokemon_info is None:
+            continue
+
+        pokeapi_id, pokemon_name = pokemon_info
+
+        # Parse levels
+        min_level, max_level = parse_levels(record.get("levels"))
+
+        # Extract rate
+        encounter_rate = extract_encounter_rate(record, generation)
+
+        # Location area
+        area_id = record.get("location_area_identifier", "")
+        if not area_id:
+            continue
+
+        enc = Encounter(
+            pokeapi_id=pokeapi_id,
+            pokemon_name=pokemon_name,
+            method=method,
+            encounter_rate=encounter_rate,
+            min_level=min_level,
+            max_level=max_level,
+        )
+
+        by_area.setdefault(area_id, []).append(enc)
+
+    return by_area
+
+
+def aggregate_encounters(encounters: list[Encounter]) -> list[Encounter]:
+    """Aggregate encounters by (pokeapi_id, method), merging level ranges and summing rates.
+
+    Replicates the Go tool's aggregation logic.
+    """
+    key_type = tuple[int, str]
+    agg: dict[key_type, Encounter] = {}
+    order: list[key_type] = []
+
+    for enc in encounters:
+        k = (enc.pokeapi_id, enc.method)
+        if k in agg:
+            existing = agg[k]
+            existing.encounter_rate += enc.encounter_rate
+            existing.min_level = min(existing.min_level, enc.min_level)
+            existing.max_level = max(existing.max_level, enc.max_level)
+        else:
+            # Copy so we don't mutate the original
+            agg[k] = Encounter(
+                pokeapi_id=enc.pokeapi_id,
+                pokemon_name=enc.pokemon_name,
+                method=enc.method,
+                encounter_rate=enc.encounter_rate,
+                min_level=enc.min_level,
+                max_level=enc.max_level,
+            )
+            order.append(k)
+
+    result = []
+    for k in order:
+        e = agg[k]
+        e.encounter_rate = min(e.encounter_rate, 100)
+        result.append(e)
+
+    # Sort by rate descending, then name ascending
+    result.sort(key=lambda e: (-e.encounter_rate, e.pokemon_name))
+    return result
+
+
+def build_routes(
+    encounters_by_area: dict[str, list[Encounter]],
+    location_mapper: LocationMapper,
+) -> list[Route]:
+    """Group encounters by location, building parent/child route hierarchy.
+
+    Multiple areas under the same location → parent route with children.
+    Single area → flat route.
+    """
+    # Group areas by their parent location identifier
+    loc_groups: dict[str, list[tuple[str, str, list[Encounter]]]] = {}
+    # loc_id → [(area_id, area_display_name, encounters), ...]
+
+    for area_id, encounters in encounters_by_area.items():
+        loc_id = location_mapper.get_location_identifier(area_id)
+        if not loc_id:
+            loc_id = area_id  # fallback
+
+        area_name = location_mapper.get_area_name(area_id)
+        loc_groups.setdefault(loc_id, []).append((area_id, area_name, encounters))
+
+    routes: list[Route] = []
+
+    for loc_id, areas in loc_groups.items():
+        loc_name = location_mapper.get_location_name(areas[0][0])
+
+        if len(areas) == 1:
+            # Single area — flat route
+            _, area_name, encounters = areas[0]
+            aggregated = aggregate_encounters(encounters)
+            if aggregated:
+                # If the area has a distinct name different from the location, use it
+                route_name = area_name if area_name and area_name != loc_name else loc_name
+                routes.append(Route(name=route_name, order=0, encounters=aggregated))
+
+        else:
+            # Multiple areas — check if encounters differ
+            children: list[Route] = []
+            # Encounters for areas with no distinct name get merged into parent
+            parent_encounters: list[Encounter] = []
+
+            for _, area_name, encounters in areas:
+                aggregated = aggregate_encounters(encounters)
+                if aggregated:
+                    if area_name and area_name != loc_name:
+                        children.append(Route(name=area_name, order=0, encounters=aggregated))
+                    else:
+                        # No distinct area name — merge into parent
+                        parent_encounters.extend(aggregated)
+
+            if children:
+                # Parent with children (parent may also have its own encounters)
+                parent_agg = aggregate_encounters(parent_encounters) if parent_encounters else []
+                routes.append(Route(
+                    name=loc_name,
+                    order=0,
+                    encounters=parent_agg,
+                    children=children,
+                ))
+            elif parent_encounters:
+                # All areas had same name — flatten into single route
+                routes.append(Route(
+                    name=loc_name,
+                    order=0,
+                    encounters=aggregate_encounters(parent_encounters),
+                ))
+
+    return routes

tools/import-pokedb/import_pokedb/sprites.py

@@ -0,0 +1,130 @@
+"""Download and manage PokeDB pokemon sprites."""
+
+from __future__ import annotations
+
+import sys
+import urllib.request
+from pathlib import Path
+from typing import Any
+
+from .mappings import PokemonMapper
+
+
+def download_sprites(
+    pokemon_mapper: PokemonMapper,
+    encountered_form_ids: set[str],
+    sprites_dir: Path,
+) -> dict[str, str]:
+    """Download sprites for all encountered pokemon forms.
+
+    Returns a mapping of pokemon_form_identifier → local sprite filename.
+    Skips already-downloaded sprites.
+    """
+    sprites_dir.mkdir(parents=True, exist_ok=True)
+
+    to_download: list[tuple[str, str, Path]] = []  # (form_id, url, dest)
+    result: dict[str, str] = {}
+
+    for form_id in sorted(encountered_form_ids):
+        info = pokemon_mapper.lookup(form_id)
+        if info is None:
+            continue
+
+        pokeapi_id, _ = info
+        sprite_url = pokemon_mapper.get_sprite_url(form_id)
+        if not sprite_url:
+            continue
+
+        filename = f"{pokeapi_id}.webp"
+        dest = sprites_dir / filename
+        result[form_id] = filename
+
+        if not dest.exists():
+            to_download.append((form_id, sprite_url, dest))
+
+    if not to_download:
+        print(f"  Sprites: {len(result)} already cached")
+        return result
+
+    print(f"  Downloading {len(to_download)} sprites ({len(result) - len(to_download)} cached)...")
+
+    failed = 0
+    for i, (form_id, url, dest) in enumerate(to_download, 1):
+        try:
+            urllib.request.urlretrieve(url, dest)
+        except Exception as e:
+            print(f"  Warning: Failed to download sprite for {form_id}: {e}", file=sys.stderr)
+            failed += 1
+            # Remove the failed entry from results
+            result.pop(form_id, None)
+
+        # Progress every 100
+        if i % 100 == 0:
+            print(f"    {i}/{len(to_download)}...")
+
+    if failed:
+        print(f"  Sprites: {len(result)} downloaded, {failed} failed")
+    else:
+        print(f"  Sprites: {len(result)} total ({len(to_download)} new)")
+
+    return result
+
+
+def download_all_sprites(
+    pokemon_mapper: PokemonMapper,
+    sprites_dir: Path,
+) -> set[int]:
+    """Download sprites for all known pokemon (not just encountered ones).
+
+    Returns a set of pokeapi_ids that have sprites downloaded.
+    """
+    sprites_dir.mkdir(parents=True, exist_ok=True)
+
+    to_download: list[tuple[int, str, Path]] = []
+    have_sprites: set[int] = set()
+
+    for pokeapi_id, (_ndex, _name) in pokemon_mapper.all_pokemon():
+        if pokemon_mapper.has_sprite_for_id(pokeapi_id):
+            filename = f"{pokeapi_id}.webp"
+            dest = sprites_dir / filename
+            have_sprites.add(pokeapi_id)
+
+            if not dest.exists():
+                # Get the sprite URL via the mapper
+                url = pokemon_mapper.get_sprite_url_for_id(pokeapi_id)
+                if url:
+                    to_download.append((pokeapi_id, url, dest))
+
+    if not to_download:
+        print(f"  All sprites: {len(have_sprites)} already cached")
+        return have_sprites
+
+    print(f"  Downloading {len(to_download)} additional sprites ({len(have_sprites) - len(to_download)} cached)...")
+
+    failed = 0
+    for i, (pid, url, dest) in enumerate(to_download, 1):
+        try:
+            urllib.request.urlretrieve(url, dest)
+        except Exception as e:
+            print(f"  Warning: Failed to download sprite for pokemon {pid}: {e}", file=sys.stderr)
+            failed += 1
+            have_sprites.discard(pid)
+
+        if i % 100 == 0:
+            print(f"    {i}/{len(to_download)}...")
+
+    if failed:
+        print(f"  All sprites: {len(have_sprites)} downloaded, {failed} failed")
+    else:
+        print(f"  All sprites: {len(have_sprites)} total ({len(to_download)} new)")
+
+    return have_sprites
+
+
+def sprite_path_for_pokemon(pokeapi_id: int) -> str:
+    """Generate the sprite URL path for use in pokemon.json.
+
+    Returns an absolute path like "/sprites/25.webp" for the frontend
+    (files in frontend/public/ are served at the root).
+    """
+    return f"/sprites/{pokeapi_id}.webp"

tools/import-pokedb/pyproject.toml

@@ -0,0 +1,9 @@
+[project]
+name = "import-pokedb"
+version = "0.1.0"
+description = "Convert PokeDB.org JSON data exports into nuzlocke-tracker seed format"
+requires-python = ">=3.12"
+dependencies = []
+
+[project.scripts]
+import-pokedb = "import_pokedb.__main__:main"