[Bug] Fix duplicate `FaintPhase` if Mimikyu faints to Disguise damage (#3686)

* Fix duplicate `FaintPhase` if Mimikyu faints to Disguise damage

* Add regression test

src/data/ability.ts

@@ -4243,7 +4243,7 @@ export class FormBlockDamageAbAttr extends ReceivedMoveDamageMultiplierAbAttr {
         (args[0] as Utils.NumberHolder).value = this.multiplier;
         pokemon.removeTag(this.tagType);
         if (this.recoilDamageFunc) {
-          pokemon.damageAndUpdate(this.recoilDamageFunc(pokemon), HitResult.OTHER);
+          pokemon.damageAndUpdate(this.recoilDamageFunc(pokemon), HitResult.OTHER, false, false, true, true);
         }
       }
       return true;

src/test/abilities/disguise.test.ts

@@ -207,4 +207,18 @@ describe("Abilities - Disguise", () => {
 
     expect(mimikyu1.formIndex).toBe(disguisedForm);
   }, TIMEOUT);
+
+  it("doesn't faint twice when fainting due to Disguise break damage, nor prevent faint from Disguise break damage if using Endure", async () => {
+    game.override.enemyMoveset(Array(4).fill(Moves.ENDURE));
+    await game.startBattle();
+
+    const mimikyu = game.scene.getEnemyPokemon()!;
+    mimikyu.hp = 1;
+
+    game.doAttack(getMovePosition(game.scene, 0, Moves.SHADOW_SNEAK));
+    await game.toNextWave();
+
+    expect(game.scene.getCurrentPhase()?.constructor.name).toBe("CommandPhase");
+    expect(game.scene.currentBattle.waveIndex).toBe(2);
+  }, TIMEOUT);
 });