implement corrosive gas

src/data/move.ts

@@ -2374,8 +2374,10 @@ export class RemoveHeldItemAttr extends MoveEffectAttr {
    * @returns {boolean} True if an item was removed
    */
   apply(user: Pokemon, target: Pokemon, move: Move, args: any[]): boolean {
-    if (!this.berriesOnly && target.isPlayer()) { // "Wild Pokemon cannot knock off Player Pokemon's held items" (See Bulbapedia)
+    if (move.id !== Moves.CORROSIVE_GAS) {
-      return false;
+      if (!this.berriesOnly && target.isPlayer()) { // "Wild Pokemon cannot knock off Player Pokemon's held items" (See Bulbapedia)
+        return false;
+      }
     }
 
     if (move.hitsSubstitute(user, target)) {
@@ -2407,6 +2409,8 @@ export class RemoveHeldItemAttr extends MoveEffectAttr {
 
       if (this.berriesOnly) {
         user.scene.queueMessage(i18next.t("moveTriggers:incineratedItem", { pokemonName: getPokemonNameWithAffix(user), targetName: getPokemonNameWithAffix(target), itemName: removedItem.type.name }));
+      } else if (move.id === Moves.CORROSIVE_GAS) {
+        user.scene.queueMessage(i18next.t("moveTriggers:corrosiveGasItem", { pokemonName: getPokemonNameWithAffix(user), targetName: getPokemonNameWithAffix(target), itemName: removedItem.type.name }));
       } else {
         user.scene.queueMessage(i18next.t("moveTriggers:knockedOffItem", { pokemonName: getPokemonNameWithAffix(user), targetName: getPokemonNameWithAffix(target), itemName: removedItem.type.name }));
       }
@@ -10034,7 +10038,7 @@ export function initMoves() {
       .makesContact(false),
     new StatusMove(Moves.CORROSIVE_GAS, Type.POISON, 100, 40, -1, 0, 8)
       .target(MoveTarget.ALL_NEAR_OTHERS)
-      .unimplemented(),
+      .attr(RemoveHeldItemAttr, false),
     new StatusMove(Moves.COACHING, Type.FIGHTING, -1, 10, -1, 0, 8)
       .attr(StatStageChangeAttr, [ Stat.ATK, Stat.DEF ], 1)
       .target(MoveTarget.NEAR_ALLY),

src/test/moves/corrosive_gas.test.ts

@@ -0,0 +1,110 @@
+import { Moves } from "#enums/moves";
+import { Species } from "#enums/species";
+import GameManager from "#test/utils/gameManager";
+import Phaser from "phaser";
+import { afterEach, beforeAll, beforeEach, describe, expect, it } from "vitest";
+
+describe("Moves - Corrosive Gas", () => {
+  let phaserGame: Phaser.Game;
+  let game: GameManager;
+
+  beforeAll(() => {
+    phaserGame = new Phaser.Game({
+      type: Phaser.HEADLESS,
+    });
+  });
+
+  afterEach(() => {
+    game.phaseInterceptor.restoreOg();
+  });
+
+  beforeEach(() => {
+    game = new GameManager(phaserGame);
+    game.override
+      .moveset([ Moves.SPLASH, Moves.CORROSIVE_GAS ])
+      .battleType("double")
+      .enemySpecies(Species.MAGIKARP)
+      .enemyMoveset(Moves.SPLASH);
+  });
+
+  it("should remove enemy and player items", async () => {
+    game.override
+      .enemyHeldItems([
+        { name: "SOUL_DEW", count: 1 },
+        { name: "LUCKY_EGG", count: 1 },
+        { name: "LEFTOVERS", count: 1 },
+        { name: "GRIP_CLAW", count: 1 },
+        { name: "MULTI_LENS", count: 1 },
+      ])
+      .startingHeldItems(
+        [
+          { name: "SOUL_DEW", count: 1 },
+          { name: "LUCKY_EGG", count: 1 },
+          { name: "LEFTOVERS", count: 1 },
+          { name: "GRIP_CLAW", count: 1 },
+          { name: "MULTI_LENS", count: 1 },
+        ]
+      );
+    await game.classicMode.startBattle([ Species.STAKATAKA, Species.SALAZZLE ]);
+    const playerPokemon = game.scene.getPlayerField()!;
+    const enemyPokemon = game.scene.getEnemyField()!;
+
+    const staka = playerPokemon[0];
+    const salazzle = playerPokemon[1];
+    const karp1 = enemyPokemon[0];
+    const karp2 = enemyPokemon[1];
+
+    const stakaHeldItemCt = staka.getHeldItems().length;
+    const salazzleHeldItemCt = salazzle.getHeldItems().length;
+    const magikarpItemCt1 = karp1.getHeldItems().length;
+    const magikarpItemCt2 = karp2.getHeldItems().length;
+
+    game.move.select(Moves.SPLASH);
+    game.move.select(Moves.CORROSIVE_GAS);
+    await game.phaseInterceptor.to("BerryPhase");
+
+    expect(salazzle.getHeldItems().length).toEqual(salazzleHeldItemCt);
+    expect(staka.getHeldItems().length).toBeLessThan(stakaHeldItemCt);
+    expect(karp1.getHeldItems().length).toBeLessThan(magikarpItemCt1);
+    expect(karp2.getHeldItems().length).toBeLessThan(magikarpItemCt2);
+  });
+
+  it("should not remove untransferrable items", async () => {
+    game.override
+      .enemyMoveset(Moves.CORROSIVE_GAS)
+      .enemyHeldItems([
+        { name: "BASE_STAT_BOOSTER", count: 1 },
+        { name: "TEMP_STAT_STAGE_BOOSTER", count: 1 }
+      ])
+      .startingHeldItems(
+        [
+          { name: "FORM_CHANGE_ITEM", count: 1 },
+          { name: "BASE_STAT_BOOSTER", count: 1 },
+          { name: "TEMP_STAT_STAGE_BOOSTER", count: 1 }
+        ]
+      );
+    await game.classicMode.startBattle([ Species.GIRATINA, Species.AGGRON ]);
+    const playerPokemon = game.scene.getPlayerField()!;
+    const enemyPokemon = game.scene.getEnemyField()!;
+
+    const giratina = playerPokemon[0];
+    const aggron = playerPokemon[1];
+    const karp1 = enemyPokemon[0];
+    const karp2 = enemyPokemon[1];
+
+    const giratinaHeldItemCt = giratina.getHeldItems().length;
+    const aggronHeldItemCt = aggron.getHeldItems().length;
+    const magikarpItemCt1 = karp1.getHeldItems().length;
+    const magikarpItemCt2 = karp2.getHeldItems().length;
+
+    game.move.select(Moves.SPLASH);
+    game.move.select(Moves.SPLASH);
+    await game.phaseInterceptor.to("BerryPhase");
+
+    expect(giratina.getHeldItems().length).toEqual(giratinaHeldItemCt);
+    expect(aggron.getHeldItems().length).toEqual(aggronHeldItemCt);
+    expect(karp1.getHeldItems().length).toEqual(magikarpItemCt1);
+    expect(karp2.getHeldItems().length).toEqual(magikarpItemCt2);
+  });
+
+});