diff --git a/src/data/ability.ts b/src/data/ability.ts
index 57d1402ad..12f8d7b51 100644
--- a/src/data/ability.ts
+++ b/src/data/ability.ts
@@ -20,6 +20,8 @@ import { SpeciesFormChangeManualTrigger } from "./pokemon-forms";
 import { Abilities } from "./enums/abilities";
 import i18next, { Localizable } from "#app/plugins/i18n.js";
 import { Command } from "../ui/command-ui-handler";
+import PokemonSpecies from "./pokemon-species";
+import { BattleType } from "#app/battle.js";
 
 export class Ability implements Localizable {
   public id: Abilities;
@@ -2055,6 +2057,28 @@ export class PostTurnFormChangeAbAttr extends PostTurnAbAttr {
   }
 }
 
+export class PreSwitchOutFormChangeAbAttr extends PreSwitchOutAbAttr {
+  private formFunc: (p: Pokemon) => integer;
+
+      constructor(formFunc: ((p: Pokemon) => integer)) {
+        super();
+    
+        this.formFunc = formFunc;
+      }
+
+  applyPreSwitchOut(pokemon: Pokemon, passive: boolean, args: any[]): boolean | Promise<boolean> {
+    console.log(pokemon.getFormKey())
+
+    const formIndex = this.formFunc(pokemon);
+    if (formIndex !== pokemon.formIndex) {
+      pokemon.scene.triggerPokemonFormChange(pokemon, SpeciesFormChangeManualTrigger, false);
+      return true;
+    }
+
+    return false;
+  }
+}
+
 export class PostBiomeChangeAbAttr extends AbAttr { }
 
 export class PostBiomeChangeWeatherChangeAbAttr extends PostBiomeChangeAbAttr {
@@ -3446,7 +3470,9 @@ export function initAbilities() {
       .attr(UnsuppressableAbilityAbAttr)
       .attr(NoTransformAbilityAbAttr)
       .attr(NoFusionAbilityAbAttr)
-      .unimplemented(),
+      .attr(PreSwitchOutFormChangeAbAttr, p => p.getFormKey() ? 1 : 0)
+      .attr(PostBattleInitFormChangeAbAttr, p => p.battleData.switchesMade === 0 && p.scene.currentBattle.battleType === BattleType.TRAINER ? 0 : 1)
+      .attr(PostSummonFormChangeAbAttr,p => p.battleData.switchesMade === 0 && p.scene.currentBattle.battleType === BattleType.TRAINER? 0 : 1),
     new Ability(Abilities.COMMANDER, 9)
       .attr(UncopiableAbilityAbAttr)
       .attr(UnswappableAbilityAbAttr)
diff --git a/src/data/pokemon-forms.ts b/src/data/pokemon-forms.ts
index 9a38ed81e..9792fc79b 100644
--- a/src/data/pokemon-forms.ts
+++ b/src/data/pokemon-forms.ts
@@ -691,6 +691,10 @@ export const pokemonFormChanges: PokemonFormChanges = {
   [Species.ENAMORUS]: [
     new SpeciesFormChange(Species.ENAMORUS, SpeciesFormKey.INCARNATE, SpeciesFormKey.THERIAN, new SpeciesFormChangeItemTrigger(FormChangeItem.REVEAL_GLASS))
   ],
+  [Species.PALAFIN]: [
+    new SpeciesFormChange(Species.PALAFIN, 'zero', 'hero', new SpeciesFormChangeManualTrigger(), true),
+    new SpeciesFormChange(Species.PALAFIN, 'hero', 'zero', new SpeciesFormChangeManualTrigger(), true),
+  ],
   [Species.OGERPON]: [
     new SpeciesFormChange(Species.OGERPON, 'teal-mask', 'wellspring-mask', new SpeciesFormChangeItemTrigger(FormChangeItem.WELLSPRING_MASK)),
     new SpeciesFormChange(Species.OGERPON, 'teal-mask', 'hearthflame-mask', new SpeciesFormChangeItemTrigger(FormChangeItem.HEARTHFLAME_MASK)),
diff --git a/src/field/pokemon.ts b/src/field/pokemon.ts
index 606185e09..36b4239d9 100644
--- a/src/field/pokemon.ts
+++ b/src/field/pokemon.ts
@@ -3106,6 +3106,7 @@ export class PokemonBattleData {
   public hitCount: integer = 0;
   public endured: boolean = false;
   public berriesEaten: BerryType[] = [];
+  public switchesMade: integer = 0;
 }
 
 export class PokemonBattleSummonData {
diff --git a/src/phases.ts b/src/phases.ts
index 6f1ebc261..b941fbbe4 100644
--- a/src/phases.ts
+++ b/src/phases.ts
@@ -1446,6 +1446,7 @@ export class SwitchSummonPhase extends SummonPhase {
     if (this.batonPass && pokemon)
       pokemon.transferSummon(this.lastPokemon);
 
+    this.lastPokemon.battleData.switchesMade++;
     this.lastPokemon?.resetSummonData();
 
     this.scene.triggerPokemonFormChange(pokemon, SpeciesFormChangeActiveTrigger, true);