[Bug][Ability] Fix wimp out and emergency exit skipping waves in double battles (#5261)

Fix wimp out causing battles to skip

src/phases/battle-end-phase.ts

@@ -17,6 +17,23 @@ export class BattleEndPhase extends BattlePhase {
   start() {
     super.start();
 
+    // cull any extra `BattleEnd` phases from the queue.
+    globalScene.phaseQueue = globalScene.phaseQueue.filter(phase => {
+      if (phase instanceof BattleEndPhase) {
+        this.isVictory ||= phase.isVictory;
+        return false;
+      }
+      return true;
+    });
+    // `phaseQueuePrepend` is private, so we have to use this inefficient loop.
+    while (globalScene.tryRemoveUnshiftedPhase(phase => {
+      if (phase instanceof BattleEndPhase) {
+        this.isVictory ||= phase.isVictory;
+        return true;
+      }
+      return false;
+    })) {}
+
     globalScene.gameData.gameStats.battles++;
     if (
       globalScene.gameMode.isEndless &&

src/phases/new-battle-phase.ts

@@ -5,6 +5,11 @@ export class NewBattlePhase extends BattlePhase {
   start() {
     super.start();
 
+    // cull any extra `NewBattle` phases from the queue.
+    globalScene.phaseQueue = globalScene.phaseQueue.filter(phase => !(phase instanceof NewBattlePhase));
+    // `phaseQueuePrepend` is private, so we have to use this inefficient loop.
+    while (globalScene.tryRemoveUnshiftedPhase(phase => phase instanceof NewBattlePhase)) {}
+
     globalScene.newBattle();
 
     this.end();

test/abilities/wimp_out.test.ts

@@ -498,6 +498,7 @@ describe("Abilities - Wimp Out", () => {
     const hasFled = enemyPokemon.switchOutStatus;
     expect(isVisible && !hasFled).toBe(true);
   });
+
   it("wimp out will not skip battles when triggered in a double battle", async () => {
     const wave = 2;
     game.override
@@ -525,4 +526,29 @@ describe("Abilities - Wimp Out", () => {
     await game.toNextWave();
     expect(game.scene.currentBattle.waveIndex).toBe(wave + 1);
   });
+
+  it("wimp out should not skip battles when triggering the same turn as another enemy faints", async () => {
+    const wave = 2;
+    game.override
+      .enemySpecies(Species.WIMPOD)
+      .enemyAbility(Abilities.WIMP_OUT)
+      .startingLevel(50)
+      .enemyLevel(1)
+      .enemyMoveset([ Moves.SPLASH, Moves.ENDURE ])
+      .battleType("double")
+      .moveset([ Moves.DRAGON_ENERGY, Moves.SPLASH ])
+      .startingWave(wave);
+
+    await game.classicMode.startBattle([ Species.REGIDRAGO, Species.MAGIKARP ]);
+
+    // turn 1
+    game.move.select(Moves.DRAGON_ENERGY, 0);
+    game.move.select(Moves.SPLASH, 1);
+    await game.forceEnemyMove(Moves.SPLASH);
+    await game.forceEnemyMove(Moves.ENDURE);
+
+    await game.phaseInterceptor.to("SelectModifierPhase");
+    expect(game.scene.currentBattle.waveIndex).toBe(wave + 1);
+
+  });
 });