.beans/nuzlocke-tracker-o18w--add-region-field-to-evolutions.md

---
# nuzlocke-tracker-o18w
title: Add region field to evolutions
status: completed
type: feature
priority: normal
created_at: 2026-02-07T18:55:07Z
updated_at: 2026-02-07T18:57:25Z
---

Add nullable region field to evolutions for regional form evolution filtering (e.g., Pikachu → Alolan Raichu only in Alola). Full-stack: DB migration, model, schemas, API, seeder, Go tool, frontend types/API/hook/components.
Add nullable region field to evolutions for regional form filtering Regional evolutions (e.g., Pikachu → Alolan Raichu) only occur in specific regions. This adds a nullable region column so the app can filter evolutions by the game's region. When a regional evolution exists for a given trigger/item, the non-regional counterpart is automatically hidden. Full-stack: migration, model, schemas, API with region query param, seeder, Go fetch tool, frontend types/API/hook/components, and admin form. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com> 2026-02-07 20:05:07 +01:00			`---`
			`# nuzlocke-tracker-o18w`
			`title: Add region field to evolutions`
			`status: completed`
			`type: feature`
			`priority: normal`
			`created_at: 2026-02-07T18:55:07Z`
			`updated_at: 2026-02-07T18:57:25Z`
			`---`

			`Add nullable region field to evolutions for regional form evolution filtering (e.g., Pikachu → Alolan Raichu only in Alola). Full-stack: DB migration, model, schemas, API, seeder, Go tool, frontend types/API/hook/components.`