diff --git a/.beans/nuzlocke-tracker-g57d--implement-conditional-boss-battle-teams.md b/.beans/nuzlocke-tracker-g57d--implement-conditional-boss-battle-teams.md
new file mode 100644
index 0000000..c1c25eb
--- /dev/null
+++ b/.beans/nuzlocke-tracker-g57d--implement-conditional-boss-battle-teams.md
@@ -0,0 +1,11 @@
+---
+# nuzlocke-tracker-g57d
+title: Implement conditional boss battle teams
+status: completed
+type: feature
+priority: normal
+created_at: 2026-02-08T19:51:02Z
+updated_at: 2026-02-08T19:54:52Z
+---
+
+Wire up the existing condition_label column on boss_pokemon to support variant teams in the UI. This includes: admin BossTeamEditor with variant tabs, BossDefeatModal with variant selector, RunEncounters boss card variant display, and schema additions for BulkBossPokemonItem and frontend BossPokemonInput.
\ No newline at end of file
diff --git a/.beans/nuzlocke-tracker-x8ol--starter-dependent-boss-battle-teams.md b/.beans/nuzlocke-tracker-x8ol--starter-dependent-boss-battle-teams.md
index 9264491..9fe6fd3 100644
--- a/.beans/nuzlocke-tracker-x8ol--starter-dependent-boss-battle-teams.md
+++ b/.beans/nuzlocke-tracker-x8ol--starter-dependent-boss-battle-teams.md
@@ -1,11 +1,11 @@
 ---
 # nuzlocke-tracker-x8ol
 title: Conditional boss battle teams
-status: draft
+status: in-progress
 type: feature
 priority: normal
 created_at: 2026-02-08T13:23:00Z
-updated_at: 2026-02-08T13:29:26Z
+updated_at: 2026-02-08T19:34:27Z
 ---
 
 Some boss battles have teams that vary based on conditions in the player's run. The most common case is starter choice (e.g., Blue's team in Gen 1 depends on whether you picked Bulbasaur, Charmander, or Squirtle), but other conditions exist too — in Pokemon Yellow, the rival's team changes based on the outcomes of two early-game fights, not the starter. This feature adds support for defining multiple team variants per boss battle, each associated with a named condition.
diff --git a/backend/src/app/alembic/versions/b7c8d9e0f1a2_add_condition_label_to_boss_pokemon.py b/backend/src/app/alembic/versions/b7c8d9e0f1a2_add_condition_label_to_boss_pokemon.py
new file mode 100644
index 0000000..b5eafc6
--- /dev/null
+++ b/backend/src/app/alembic/versions/b7c8d9e0f1a2_add_condition_label_to_boss_pokemon.py
@@ -0,0 +1,26 @@
+"""add condition_label to boss_pokemon
+
+Revision ID: b7c8d9e0f1a2
+Revises: a6b7c8d9e0f1
+Create Date: 2026-02-08 22:00:00.000000
+
+"""
+from typing import Sequence, Union
+
+import sqlalchemy as sa
+from alembic import op
+
+
+# revision identifiers, used by Alembic.
+revision: str = 'b7c8d9e0f1a2'
+down_revision: Union[str, Sequence[str], None] = 'a6b7c8d9e0f1'
+branch_labels: Union[str, Sequence[str], None] = None
+depends_on: Union[str, Sequence[str], None] = None
+
+
+def upgrade() -> None:
+    op.add_column('boss_pokemon', sa.Column('condition_label', sa.String(100), nullable=True))
+
+
+def downgrade() -> None:
+    op.drop_column('boss_pokemon', 'condition_label')
diff --git a/backend/src/app/api/bosses.py b/backend/src/app/api/bosses.py
index 4ff9ee5..f598a0c 100644
--- a/backend/src/app/api/bosses.py
+++ b/backend/src/app/api/bosses.py
@@ -228,11 +228,17 @@ async def set_boss_team(
             pokemon_id=item.pokemon_id,
             level=item.level,
             order=item.order,
+            condition_label=item.condition_label,
         )
         session.add(bp)
 
     await session.commit()
 
+    # Clear identity map so selectinload fetches everything fresh
+    # (expired Pokemon from deleted BossPokemon would otherwise cause
+    # MissingGreenlet errors during response serialization)
+    session.expunge_all()
+
     # Re-fetch with eager loading
     result = await session.execute(
         select(BossBattle)
diff --git a/backend/src/app/api/export.py b/backend/src/app/api/export.py
index 6fff59a..bc4b9b8 100644
--- a/backend/src/app/api/export.py
+++ b/backend/src/app/api/export.py
@@ -154,6 +154,7 @@ async def export_game_bosses(
                         "pokemon_name": bp.pokemon.name,
                         "level": bp.level,
                         "order": bp.order,
+                        **({"condition_label": bp.condition_label} if bp.condition_label else {}),
                     }
                     for bp in sorted(b.pokemon, key=lambda p: p.order)
                 ],
diff --git a/backend/src/app/models/boss_pokemon.py b/backend/src/app/models/boss_pokemon.py
index 39014f5..56aa8cb 100644
--- a/backend/src/app/models/boss_pokemon.py
+++ b/backend/src/app/models/boss_pokemon.py
@@ -1,4 +1,4 @@
-from sqlalchemy import ForeignKey, SmallInteger
+from sqlalchemy import ForeignKey, SmallInteger, String
 from sqlalchemy.orm import Mapped, mapped_column, relationship
 
 from app.core.database import Base
@@ -14,6 +14,7 @@ class BossPokemon(Base):
     pokemon_id: Mapped[int] = mapped_column(ForeignKey("pokemon.id"), index=True)
     level: Mapped[int] = mapped_column(SmallInteger)
     order: Mapped[int] = mapped_column(SmallInteger)
+    condition_label: Mapped[str | None] = mapped_column(String(100))
 
     boss_battle: Mapped["BossBattle"] = relationship(back_populates="pokemon")
     pokemon: Mapped["Pokemon"] = relationship()
diff --git a/backend/src/app/schemas/boss.py b/backend/src/app/schemas/boss.py
index 7174128..61b2b17 100644
--- a/backend/src/app/schemas/boss.py
+++ b/backend/src/app/schemas/boss.py
@@ -9,6 +9,7 @@ class BossPokemonResponse(CamelModel):
     pokemon_id: int
     level: int
     order: int
+    condition_label: str | None
     pokemon: PokemonResponse
 
 
@@ -73,6 +74,7 @@ class BossPokemonInput(CamelModel):
     pokemon_id: int
     level: int
     order: int
+    condition_label: str | None = None
 
 
 class BossResultCreate(CamelModel):
diff --git a/backend/src/app/schemas/pokemon.py b/backend/src/app/schemas/pokemon.py
index f99e24d..c6dce95 100644
--- a/backend/src/app/schemas/pokemon.py
+++ b/backend/src/app/schemas/pokemon.py
@@ -200,6 +200,7 @@ class BulkBossPokemonItem(BaseModel):
     pokeapi_id: int
     level: int
     order: int
+    condition_label: str | None = None
 
 
 class BulkBossItem(BaseModel):
diff --git a/backend/src/app/seeds/loader.py b/backend/src/app/seeds/loader.py
index 04d4f31..acfae14 100644
--- a/backend/src/app/seeds/loader.py
+++ b/backend/src/app/seeds/loader.py
@@ -270,6 +270,7 @@ async def upsert_bosses(
                 pokemon_id=pokemon_id,
                 level=bp["level"],
                 order=bp["order"],
+                condition_label=bp.get("condition_label"),
             ))
 
         count += 1
diff --git a/frontend/src/components/BossDefeatModal.tsx b/frontend/src/components/BossDefeatModal.tsx
index 324f387..1231ab3 100644
--- a/frontend/src/components/BossDefeatModal.tsx
+++ b/frontend/src/components/BossDefeatModal.tsx
@@ -1,4 +1,4 @@
-import { type FormEvent, useState } from 'react'
+import { type FormEvent, useState, useMemo } from 'react'
 import type { BossBattle, CreateBossResultInput } from '../types/game'
 
 interface BossDefeatModalProps {
@@ -13,6 +13,26 @@ export function BossDefeatModal({ boss, onSubmit, onClose, isPending, hardcoreMo
   const [result, setResult] = useState<'won' | 'lost'>('won')
   const [attempts, setAttempts] = useState('1')
 
+  const variantLabels = useMemo(() => {
+    const labels = new Set<string>()
+    for (const bp of boss.pokemon) {
+      if (bp.conditionLabel) labels.add(bp.conditionLabel)
+    }
+    return [...labels].sort()
+  }, [boss.pokemon])
+
+  const hasVariants = variantLabels.length > 0
+  const [selectedVariant, setSelectedVariant] = useState<string | null>(
+    hasVariants ? variantLabels[0] : null,
+  )
+
+  const displayedPokemon = useMemo(() => {
+    if (!hasVariants) return boss.pokemon
+    return boss.pokemon.filter(
+      (bp) => bp.conditionLabel === selectedVariant || bp.conditionLabel === null,
+    )
+  }, [boss.pokemon, hasVariants, selectedVariant])
+
   const handleSubmit = (e: FormEvent) => {
     e.preventDefault()
     onSubmit({
@@ -34,8 +54,26 @@ export function BossDefeatModal({ boss, onSubmit, onClose, isPending, hardcoreMo
         {/* Boss team preview */}
         {boss.pokemon.length > 0 && (
           <div className="px-6 py-3 border-b border-gray-200 dark:border-gray-700">
+            {hasVariants && (
+              <div className="flex gap-1 mb-2 flex-wrap">
+                {variantLabels.map((label) => (
+                  <button
+                    key={label}
+                    type="button"
+                    onClick={() => setSelectedVariant(label)}
+                    className={`px-2 py-0.5 text-xs font-medium rounded-full transition-colors ${
+                      selectedVariant === label
+                        ? 'bg-blue-600 text-white'
+                        : 'bg-gray-100 dark:bg-gray-700 text-gray-600 dark:text-gray-300 hover:bg-gray-200 dark:hover:bg-gray-600'
+                    }`}
+                  >
+                    {label}
+                  </button>
+                ))}
+              </div>
+            )}
             <div className="flex flex-wrap gap-3">
-              {boss.pokemon
+              {[...displayedPokemon]
                 .sort((a, b) => a.order - b.order)
                 .map((bp) => (
                   <div key={bp.id} className="flex flex-col items-center">
diff --git a/frontend/src/components/admin/BossTeamEditor.tsx b/frontend/src/components/admin/BossTeamEditor.tsx
index f9a347e..427263d 100644
--- a/frontend/src/components/admin/BossTeamEditor.tsx
+++ b/frontend/src/components/admin/BossTeamEditor.tsx
@@ -10,47 +10,117 @@ interface BossTeamEditorProps {
   isSaving?: boolean
 }
 
+interface PokemonSlot {
+  pokemonId: number | null
+  pokemonName: string
+  level: string
+  order: number
+}
+
+interface Variant {
+  label: string | null
+  pokemon: PokemonSlot[]
+}
+
+function groupByVariant(boss: BossBattle): Variant[] {
+  const sorted = [...boss.pokemon].sort((a, b) => a.order - b.order)
+  const map = new Map<string | null, PokemonSlot[]>()
+
+  for (const bp of sorted) {
+    const key = bp.conditionLabel
+    if (!map.has(key)) map.set(key, [])
+    map.get(key)!.push({
+      pokemonId: bp.pokemonId,
+      pokemonName: bp.pokemon.name,
+      level: String(bp.level),
+      order: bp.order,
+    })
+  }
+
+  if (map.size === 0) {
+    return [{ label: null, pokemon: [{ pokemonId: null, pokemonName: '', level: '', order: 1 }] }]
+  }
+
+  const variants: Variant[] = []
+  // null (default) first
+  if (map.has(null)) {
+    variants.push({ label: null, pokemon: map.get(null)! })
+    map.delete(null)
+  }
+  // Then alphabetical
+  const remaining = [...map.entries()].sort((a, b) => (a[0] ?? '').localeCompare(b[0] ?? ''))
+  for (const [label, pokemon] of remaining) {
+    variants.push({ label, pokemon })
+  }
+  return variants
+}
+
 export function BossTeamEditor({ boss, onSave, onClose, isSaving }: BossTeamEditorProps) {
-  const [team, setTeam] = useState<Array<{ pokemonId: number | null; pokemonName: string; level: string; order: number }>>(
-    boss.pokemon.length > 0
-      ? boss.pokemon
-          .sort((a, b) => a.order - b.order)
-          .map((bp) => ({
-            pokemonId: bp.pokemonId,
-            pokemonName: bp.pokemon.name,
-            level: String(bp.level),
-            order: bp.order,
-          }))
-      : [{ pokemonId: null, pokemonName: '', level: '', order: 1 }],
-  )
+  const [variants, setVariants] = useState<Variant[]>(() => groupByVariant(boss))
+  const [activeTab, setActiveTab] = useState(0)
+  const [newVariantName, setNewVariantName] = useState('')
+  const [showAddVariant, setShowAddVariant] = useState(false)
+
+  const activeVariant = variants[activeTab] ?? variants[0]
+
+  const updateVariant = (tabIndex: number, updater: (v: Variant) => Variant) => {
+    setVariants((prev) => prev.map((v, i) => (i === tabIndex ? updater(v) : v)))
+  }
 
   const addSlot = () => {
-    setTeam((prev) => [
-      ...prev,
-      { pokemonId: null, pokemonName: '', level: '', order: prev.length + 1 },
-    ])
+    updateVariant(activeTab, (v) => ({
+      ...v,
+      pokemon: [...v.pokemon, { pokemonId: null, pokemonName: '', level: '', order: v.pokemon.length + 1 }],
+    }))
   }
 
   const removeSlot = (index: number) => {
-    setTeam((prev) => prev.filter((_, i) => i !== index).map((item, i) => ({ ...item, order: i + 1 })))
+    updateVariant(activeTab, (v) => ({
+      ...v,
+      pokemon: v.pokemon.filter((_, i) => i !== index).map((item, i) => ({ ...item, order: i + 1 })),
+    }))
   }
 
   const updateSlot = (index: number, field: string, value: number | string | null) => {
-    setTeam((prev) =>
-      prev.map((item, i) => (i === index ? { ...item, [field]: value } : item)),
-    )
+    updateVariant(activeTab, (v) => ({
+      ...v,
+      pokemon: v.pokemon.map((item, i) => (i === index ? { ...item, [field]: value } : item)),
+    }))
+  }
+
+  const addVariant = () => {
+    const name = newVariantName.trim()
+    if (!name) return
+    if (variants.some((v) => v.label === name)) return
+    setVariants((prev) => [...prev, { label: name, pokemon: [{ pokemonId: null, pokemonName: '', level: '', order: 1 }] }])
+    setActiveTab(variants.length)
+    setNewVariantName('')
+    setShowAddVariant(false)
+  }
+
+  const removeVariant = (tabIndex: number) => {
+    if (variants[tabIndex].label === null) return
+    if (!window.confirm(`Remove variant "${variants[tabIndex].label}"?`)) return
+    setVariants((prev) => prev.filter((_, i) => i !== tabIndex))
+    setActiveTab((prev) => Math.min(prev, variants.length - 2))
   }
 
   const handleSubmit = (e: FormEvent) => {
     e.preventDefault()
-    const validTeam: BossPokemonInput[] = team
-      .filter((t) => t.pokemonId != null && t.level)
-      .map((t, i) => ({
-        pokemonId: t.pokemonId!,
-        level: Number(t.level),
-        order: i + 1,
-      }))
-    onSave(validTeam)
+    const allPokemon: BossPokemonInput[] = []
+    for (const variant of variants) {
+      const conditionLabel = variants.length === 1 && variant.label === null ? null : variant.label
+      const validPokemon = variant.pokemon.filter((t) => t.pokemonId != null && t.level)
+      for (let i = 0; i < validPokemon.length; i++) {
+        allPokemon.push({
+          pokemonId: validPokemon[i].pokemonId!,
+          level: Number(validPokemon[i].level),
+          order: i + 1,
+          conditionLabel,
+        })
+      }
+    }
+    onSave(allPokemon)
   }
 
   return (
@@ -61,10 +131,61 @@ export function BossTeamEditor({ boss, onSave, onClose, isSaving }: BossTeamEdit
           <h2 className="text-lg font-semibold">{boss.name}'s Team</h2>
         </div>
 
+        {/* Variant tabs */}
+        <div className="px-6 pt-3 flex items-center gap-1 flex-wrap border-b border-gray-200 dark:border-gray-700">
+          {variants.map((v, i) => (
+            <button
+              key={v.label ?? '__default'}
+              type="button"
+              onClick={() => setActiveTab(i)}
+              className={`px-3 py-1.5 text-sm font-medium rounded-t-md border border-b-0 transition-colors ${
+                activeTab === i
+                  ? 'bg-white dark:bg-gray-800 border-gray-200 dark:border-gray-700 text-gray-900 dark:text-gray-100'
+                  : 'bg-gray-50 dark:bg-gray-700 border-transparent text-gray-500 dark:text-gray-400 hover:text-gray-700 dark:hover:text-gray-300'
+              }`}
+            >
+              {v.label ?? 'Default'}
+              {v.label !== null && (
+                <span
+                  onClick={(e) => { e.stopPropagation(); removeVariant(i) }}
+                  className="ml-1.5 text-gray-400 hover:text-red-500 cursor-pointer"
+                  title="Remove variant"
+                >
+                  &#10005;
+                </span>
+              )}
+            </button>
+          ))}
+          {!showAddVariant ? (
+            <button
+              type="button"
+              onClick={() => setShowAddVariant(true)}
+              className="px-2 py-1.5 text-sm text-blue-600 dark:text-blue-400 hover:text-blue-700 dark:hover:text-blue-300"
+              title="Add variant"
+            >
+              +
+            </button>
+          ) : (
+            <div className="flex items-center gap-1 pb-1">
+              <input
+                type="text"
+                value={newVariantName}
+                onChange={(e) => setNewVariantName(e.target.value)}
+                onKeyDown={(e) => { if (e.key === 'Enter') { e.preventDefault(); addVariant() } if (e.key === 'Escape') setShowAddVariant(false) }}
+                placeholder="Variant name..."
+                className="px-2 py-1 text-sm border rounded dark:bg-gray-700 dark:border-gray-600 w-40"
+                autoFocus
+              />
+              <button type="button" onClick={addVariant} className="px-2 py-1 text-sm text-blue-600 dark:text-blue-400">Add</button>
+              <button type="button" onClick={() => setShowAddVariant(false)} className="px-1 py-1 text-sm text-gray-400">&#10005;</button>
+            </div>
+          )}
+        </div>
+
         <form onSubmit={handleSubmit}>
           <div className="px-6 py-4 space-y-3">
-            {team.map((slot, index) => (
-              <div key={index} className="flex items-end gap-2">
+            {activeVariant.pokemon.map((slot, index) => (
+              <div key={`${activeTab}-${index}`} className="flex items-end gap-2">
                 <div className="flex-1">
                   <PokemonSelector
                     label={`Pokemon ${index + 1}`}
@@ -95,7 +216,7 @@ export function BossTeamEditor({ boss, onSave, onClose, isSaving }: BossTeamEdit
               </div>
             ))}
 
-            {team.length < 6 && (
+            {activeVariant.pokemon.length < 6 && (
               <button
                 type="button"
                 onClick={addSlot}
diff --git a/frontend/src/pages/RunEncounters.tsx b/frontend/src/pages/RunEncounters.tsx
index 1343524..9b7094b 100644
--- a/frontend/src/pages/RunEncounters.tsx
+++ b/frontend/src/pages/RunEncounters.tsx
@@ -26,6 +26,7 @@ import type {
   EncounterStatus,
   CreateEncounterInput,
   BossBattle,
+  BossPokemon,
 } from '../types'
 
 const statusStyles: Record<RunStatus, string> = {
@@ -145,6 +146,67 @@ function countDistinctZones(group: RouteWithChildren): number {
   return zones.size
 }
 
+function BossTeamPreview({ pokemon }: { pokemon: BossPokemon[] }) {
+  const variantLabels = useMemo(() => {
+    const labels = new Set<string>()
+    for (const bp of pokemon) {
+      if (bp.conditionLabel) labels.add(bp.conditionLabel)
+    }
+    return [...labels].sort()
+  }, [pokemon])
+
+  const hasVariants = variantLabels.length > 0
+  const [selectedVariant, setSelectedVariant] = useState<string | null>(
+    hasVariants ? variantLabels[0] : null,
+  )
+
+  const displayed = useMemo(() => {
+    if (!hasVariants) return pokemon
+    return pokemon.filter(
+      (bp) => bp.conditionLabel === selectedVariant || bp.conditionLabel === null,
+    )
+  }, [pokemon, hasVariants, selectedVariant])
+
+  return (
+    <div className="mt-2">
+      {hasVariants && (
+        <div className="flex gap-1 mb-2 flex-wrap">
+          {variantLabels.map((label) => (
+            <button
+              key={label}
+              type="button"
+              onClick={() => setSelectedVariant(label)}
+              className={`px-2 py-0.5 text-xs font-medium rounded-full transition-colors ${
+                selectedVariant === label
+                  ? 'bg-blue-600 text-white'
+                  : 'bg-gray-100 dark:bg-gray-700 text-gray-600 dark:text-gray-300 hover:bg-gray-200 dark:hover:bg-gray-600'
+              }`}
+            >
+              {label}
+            </button>
+          ))}
+        </div>
+      )}
+      <div className="flex gap-2 flex-wrap">
+        {[...displayed]
+          .sort((a, b) => a.order - b.order)
+          .map((bp) => (
+            <div key={bp.id} className="flex items-center gap-1">
+              {bp.pokemon.spriteUrl ? (
+                <img src={bp.pokemon.spriteUrl} alt={bp.pokemon.name} className="w-20 h-20" />
+              ) : (
+                <div className="w-20 h-20 bg-gray-200 dark:bg-gray-700 rounded-full" />
+              )}
+              <span className="text-xs text-gray-500 dark:text-gray-400">
+                Lvl {bp.level}
+              </span>
+            </div>
+          ))}
+      </div>
+    </div>
+  )
+}
+
 interface RouteGroupProps {
   group: RouteWithChildren
   encounterByRoute: Map<number, EncounterDetail>
@@ -1124,22 +1186,7 @@ export function RunEncounters() {
                     </div>
                     {/* Boss pokemon team */}
                     {isBossExpanded && boss.pokemon.length > 0 && (
-                      <div className="flex gap-2 mt-2 flex-wrap">
-                        {boss.pokemon
-                          .sort((a, b) => a.order - b.order)
-                          .map((bp) => (
-                            <div key={bp.id} className="flex items-center gap-1">
-                              {bp.pokemon.spriteUrl ? (
-                                <img src={bp.pokemon.spriteUrl} alt={bp.pokemon.name} className="w-20 h-20" />
-                              ) : (
-                                <div className="w-20 h-20 bg-gray-200 dark:bg-gray-700 rounded-full" />
-                              )}
-                              <span className="text-xs text-gray-500 dark:text-gray-400">
-                                Lvl {bp.level}
-                              </span>
-                            </div>
-                          ))}
-                      </div>
+                      <BossTeamPreview pokemon={boss.pokemon} />
                     )}
                     </div>
                     {sectionAfter && (
diff --git a/frontend/src/types/admin.ts b/frontend/src/types/admin.ts
index f657dda..30769c4 100644
--- a/frontend/src/types/admin.ts
+++ b/frontend/src/types/admin.ts
@@ -176,4 +176,5 @@ export interface BossPokemonInput {
   pokemonId: number
   level: number
   order: number
+  conditionLabel?: string | null
 }
diff --git a/frontend/src/types/game.ts b/frontend/src/types/game.ts
index 3a53af9..b7ac039 100644
--- a/frontend/src/types/game.ts
+++ b/frontend/src/types/game.ts
@@ -137,6 +137,7 @@ export interface BossPokemon {
   pokemonId: number
   level: number
   order: number
+  conditionLabel: string | null
   pokemon: Pokemon
 }