[Ability] Partially implement Gulp Missile

src/data/ability.ts

@@ -6,7 +6,7 @@ import { BattleStat, getBattleStatName } from "./battle-stat";
 import { MovePhase, PokemonHealPhase, ShowAbilityPhase, StatChangePhase } from "../phases";
 import { getPokemonNameWithAffix } from "../messages";
 import { Weather, WeatherType } from "./weather";
-import { BattlerTag, GroundedTag } from "./battler-tags";
+import { BattlerTag, GroundedTag, GulpMissileTag } from "./battler-tags";
 import { StatusEffect, getNonVolatileStatusEffects, getStatusEffectDescriptor, getStatusEffectHealText } from "./status-effect";
 import { Gender } from "./gender";
 import Move, { AttackMove, MoveCategory, MoveFlags, MoveTarget, FlinchAttr, OneHitKOAttr, HitHealAttr, allMoves, StatusMove, SelfStatusMove, VariablePowerAttr, applyMoveAttrs, IncrementMovePriorityAttr, VariableMoveTypeAttr, RandomMovesetMoveAttr, RandomMoveAttr, NaturePowerAttr, CopyMoveAttr, MoveAttr, MultiHitAttr, ChargeAttr, SacrificialAttr, SacrificialAttrOnHit } from "./move";
@@ -496,6 +496,49 @@ export class PostDefendAbAttr extends AbAttr {
   }
 }
 
+/**
+ * Applies the effects of Gulp Missile when the user is hit by an attack.
+ * @extends PostDefendAbAttr
+ */
+export class PostDefendGulpMissileAbAttr extends PostDefendAbAttr {
+  constructor() {
+    super(true);
+  }
+
+  /**
+   * Damages the attacker and triggers the secondary effect based on the form or the BattlerTagType.
+   * @param {Pokemon} pokemon - The defending Pokemon.
+   * @param passive - n/a
+   * @param {Pokemon} attacker - The attacking Pokemon.
+   * @param {Move} move - The move being used.
+   * @param {HitResult} hitResult - n/a
+   * @param {any[]} args - n/a
+   * @returns Whether the effects of the ability are applied.
+   */
+  applyPostDefend(pokemon: Pokemon, passive: boolean, attacker: Pokemon, move: Move, hitResult: HitResult, args: any[]): boolean | Promise<boolean> {
+    const battlerTag = pokemon.getTag(GulpMissileTag);
+    if (!battlerTag || move.category === MoveCategory.STATUS) {
+      return false;
+    }
+
+    const cancelled = new Utils.BooleanHolder(false);
+    applyAbAttrs(BlockNonDirectDamageAbAttr, attacker, cancelled);
+
+    if (!cancelled.value) {
+      attacker.damageAndUpdate(Math.floor(attacker.getMaxHp() * 1/4), HitResult.OTHER);
+    }
+
+    if (battlerTag.tagType === BattlerTagType.GULP_MISSILE_ARROKUDA) {
+      pokemon.scene.unshiftPhase(new StatChangePhase(pokemon.scene, attacker.getBattlerIndex(), false, [ BattleStat.DEF ], -1));
+    } else {
+      attacker.trySetStatus(StatusEffect.PARALYSIS, true, pokemon);
+    }
+
+    pokemon.removeTag(battlerTag.tagType);
+    return true;
+  }
+}
+
 export class PostDefendDisguiseAbAttr extends PostDefendAbAttr {
 
   applyPostDefend(pokemon: Pokemon, passive: boolean, attacker: Pokemon, move: Move, hitResult: HitResult, args: any[]): boolean {
@@ -5082,7 +5125,9 @@ export function initAbilities() {
       .attr(UnsuppressableAbilityAbAttr)
       .attr(NoTransformAbilityAbAttr)
       .attr(NoFusionAbilityAbAttr)
-      .unimplemented(),
+      .attr(UncopiableAbilityAbAttr)
+      .attr(UnswappableAbilityAbAttr)
+      .attr(PostDefendGulpMissileAbAttr),
     new Ability(Abilities.STALWART, 8)
       .attr(BlockRedirectAbAttr),
     new Ability(Abilities.STEAM_ENGINE, 8)

src/data/battler-tags.ts

@@ -1647,6 +1647,47 @@ export class StockpilingTag extends BattlerTag {
   }
 }
 
+/**
+ * Battler tag for Gulp Missile. This is mainly use in triggering Cramorant's form changes.
+ * @extends BattlerTag
+ */
+export class GulpMissileTag extends BattlerTag {
+  constructor(tagType: BattlerTagType, sourceMove: Moves) {
+    super(tagType, BattlerTagLapseType.CUSTOM, 0, sourceMove);
+  }
+
+  /**
+   * Gulp Missile's initial form changes are triggered by using Surf and Dive.
+   * @param {Pokemon} pokemon The Pokemon with Gulp Missile ability.
+   * @returns Whether the BattlerTag can be added.
+   */
+  canAdd(pokemon: Pokemon): boolean {
+    const isSurfOrDive= [ Moves.SURF, Moves.DIVE ].includes(this.sourceMove);
+    return isSurfOrDive && !pokemon.getTag(BattlerTagType.GULP_MISSILE_ARROKUDA) && !pokemon.getTag(BattlerTagType.GULP_MISSILE_PIKACHU);
+  }
+
+  onAdd(pokemon: Pokemon): void {
+    super.onAdd(pokemon);
+    this.triggerFormChange(pokemon);
+  }
+
+  onRemove(pokemon: Pokemon): void {
+    super.onRemove(pokemon);
+    this.triggerFormChange(pokemon);
+  }
+
+  /**
+   * Triggers the form change when the Pokemon is Cramorant
+   * @param {Pokemon} pokemon The Pokemon with Gulp Missile ability
+   */
+  triggerFormChange(pokemon: Pokemon): void {
+    const gulpTags = [ BattlerTagType.GULP_MISSILE_ARROKUDA, BattlerTagType.GULP_MISSILE_PIKACHU ];
+    if (pokemon.species.speciesId === Species.CRAMORANT && gulpTags.includes(this.tagType)) {
+      pokemon.scene.triggerPokemonFormChange(pokemon, SpeciesFormChangeManualTrigger);
+    }
+  }
+}
+
 export function getBattlerTag(tagType: BattlerTagType, turnCount: number, sourceMove: Moves, sourceId: number): BattlerTag {
   switch (tagType) {
   case BattlerTagType.RECHARGING:
@@ -1770,6 +1811,9 @@ export function getBattlerTag(tagType: BattlerTagType, turnCount: number, source
     return new StockpilingTag(sourceMove);
   case BattlerTagType.OCTOLOCK:
     return new OctolockTag(sourceId);
+  case BattlerTagType.GULP_MISSILE_ARROKUDA:
+  case BattlerTagType.GULP_MISSILE_PIKACHU:
+    return new GulpMissileTag(tagType, sourceMove);
   case BattlerTagType.NONE:
   default:
     return new BattlerTag(tagType, BattlerTagLapseType.CUSTOM, turnCount, sourceMove, sourceId);

src/data/move.ts

@@ -1,7 +1,7 @@
 import { ChargeAnim, MoveChargeAnim, initMoveAnim, loadMoveAnimAssets } from "./battle-anims";
 import { BattleEndPhase, MoveEndPhase, MovePhase, NewBattlePhase, PartyStatusCurePhase, PokemonHealPhase, StatChangePhase, SwitchSummonPhase } from "../phases";
 import { BattleStat, getBattleStatName } from "./battle-stat";
-import { EncoreTag, HelpingHandTag, SemiInvulnerableTag, StockpilingTag, TypeBoostTag } from "./battler-tags";
+import { EncoreTag, GulpMissileTag, HelpingHandTag, SemiInvulnerableTag, StockpilingTag, TypeBoostTag } from "./battler-tags";
 import { getPokemonNameWithAffix } from "../messages";
 import Pokemon, { AttackMoveResult, EnemyPokemon, HitResult, MoveResult, PlayerPokemon, PokemonMove, TurnMove } from "../field/pokemon";
 import { StatusEffect, getStatusEffectHealText, isNonVolatileStatusEffect, getNonVolatileStatusEffects} from "./status-effect";
@@ -10,7 +10,7 @@ import { Constructor } from "#app/utils";
 import * as Utils from "../utils";
 import { WeatherType } from "./weather";
 import { ArenaTagSide, ArenaTrapTag, WeakenMoveTypeTag } from "./arena-tag";
-import { UnswappableAbilityAbAttr, UncopiableAbilityAbAttr, UnsuppressableAbilityAbAttr, BlockRecoilDamageAttr, BlockOneHitKOAbAttr, IgnoreContactAbAttr, MaxMultiHitAbAttr, applyAbAttrs, BlockNonDirectDamageAbAttr, applyPreSwitchOutAbAttrs, PreSwitchOutAbAttr, applyPostDefendAbAttrs, PostDefendContactApplyStatusEffectAbAttr, MoveAbilityBypassAbAttr, ReverseDrainAbAttr, FieldPreventExplosiveMovesAbAttr, ForceSwitchOutImmunityAbAttr, BlockItemTheftAbAttr, applyPostAttackAbAttrs, ConfusionOnStatusEffectAbAttr, HealFromBerryUseAbAttr, IgnoreProtectOnContactAbAttr, IgnoreMoveEffectsAbAttr, applyPreDefendAbAttrs, MoveEffectChanceMultiplierAbAttr, WonderSkinAbAttr, applyPreAttackAbAttrs, MoveTypeChangeAttr, UserFieldMoveTypePowerBoostAbAttr, FieldMoveTypePowerBoostAbAttr, AllyMoveCategoryPowerBoostAbAttr, VariableMovePowerAbAttr } from "./ability";
+import { UnswappableAbilityAbAttr, UncopiableAbilityAbAttr, UnsuppressableAbilityAbAttr, BlockRecoilDamageAttr, BlockOneHitKOAbAttr, IgnoreContactAbAttr, MaxMultiHitAbAttr, applyAbAttrs, BlockNonDirectDamageAbAttr, applyPreSwitchOutAbAttrs, PreSwitchOutAbAttr, applyPostDefendAbAttrs, PostDefendContactApplyStatusEffectAbAttr, MoveAbilityBypassAbAttr, ReverseDrainAbAttr, FieldPreventExplosiveMovesAbAttr, ForceSwitchOutImmunityAbAttr, BlockItemTheftAbAttr, applyPostAttackAbAttrs, ConfusionOnStatusEffectAbAttr, HealFromBerryUseAbAttr, IgnoreProtectOnContactAbAttr, IgnoreMoveEffectsAbAttr, applyPreDefendAbAttrs, MoveEffectChanceMultiplierAbAttr, WonderSkinAbAttr, applyPreAttackAbAttrs, MoveTypeChangeAttr, UserFieldMoveTypePowerBoostAbAttr, FieldMoveTypePowerBoostAbAttr, AllyMoveCategoryPowerBoostAbAttr, VariableMovePowerAbAttr, PostDefendGulpMissileAbAttr } from "./ability";
 import { allAbilities } from "./ability";
 import { PokemonHeldItemModifier, BerryModifier, PreserveBerryModifier, PokemonMoveAccuracyBoosterModifier, AttackTypeBoosterModifier, PokemonMultiHitModifier } from "../modifier/modifier";
 import { BattlerIndex, BattleType } from "../battle";
@@ -4276,6 +4276,45 @@ export class AddBattlerTagAttr extends MoveEffectAttr {
   }
 }
 
+/**
+ * Adds the appropriate battler tag for Gulp Missile when Surf or Dive is used.
+ * @extends MoveEffectAttr
+ */
+export class GulpMissileTagAttr extends MoveEffectAttr {
+  constructor() {
+    super(true, MoveEffectTrigger.POST_APPLY);
+  }
+
+  /**
+   * Adds BattlerTagType from GulpMissileTag based on the Pokemon's HP ratio.
+   * @param {Pokemon} user The Pokemon using the move.
+   * @param {Pokemon} target The Pokemon being targeted by the move.
+   * @param {Move} move The move being used.
+   * @param {any[]} args Additional arguments, if any.
+   * @returns Whether the BattlerTag is applied.
+   */
+  apply(user: Pokemon, target: Pokemon, move: Move, args: any[]): boolean | Promise<boolean> {
+    if (!super.apply(user, target, move, args)) {
+      return false;
+    }
+
+    if (user.hasAbility(Abilities.GULP_MISSILE)) {
+      if (user.getHpRatio() >= .5) {
+        user.addTag(BattlerTagType.GULP_MISSILE_ARROKUDA, 0, move.id);
+      } else {
+        user.addTag(BattlerTagType.GULP_MISSILE_PIKACHU, 0, move.id);
+      }
+      return true;
+    }
+
+    return false;
+  }
+
+  getUserBenefitScore(user: Pokemon, target: Pokemon, move: Move): integer {
+    return user.hasAbilityWithAttr(PostDefendGulpMissileAbAttr) && !user.getTag(GulpMissileTag) ? 10 : 0;
+  }
+}
+
 export class CurseAttr extends MoveEffectAttr {
 
   apply(user: Pokemon, target: Pokemon, move:Move, args: any[]): boolean {
@@ -6103,7 +6142,8 @@ export function initMoves() {
     new AttackMove(Moves.HYDRO_PUMP, Type.WATER, MoveCategory.SPECIAL, 110, 80, 5, -1, 0, 1),
     new AttackMove(Moves.SURF, Type.WATER, MoveCategory.SPECIAL, 90, 100, 15, -1, 0, 1)
       .target(MoveTarget.ALL_NEAR_OTHERS)
-      .attr(HitsTagAttr, BattlerTagType.UNDERWATER, true),
+      .attr(HitsTagAttr, BattlerTagType.UNDERWATER, true)
+      .attr(GulpMissileTagAttr),
     new AttackMove(Moves.ICE_BEAM, Type.ICE, MoveCategory.SPECIAL, 90, 100, 10, 10, 0, 1)
       .attr(StatusEffectAttr, StatusEffect.FREEZE),
     new AttackMove(Moves.BLIZZARD, Type.ICE, MoveCategory.SPECIAL, 110, 70, 5, 10, 0, 1)
@@ -6767,6 +6807,7 @@ export function initMoves() {
       .partial(),
     new AttackMove(Moves.DIVE, Type.WATER, MoveCategory.PHYSICAL, 80, 100, 10, -1, 0, 3)
       .attr(ChargeAttr, ChargeAnim.DIVE_CHARGING, i18next.t("moveTriggers:hidUnderwater", {pokemonName: "{USER}"}), BattlerTagType.UNDERWATER)
+      .attr(GulpMissileTagAttr)
       .ignoresVirtual(),
     new AttackMove(Moves.ARM_THRUST, Type.FIGHTING, MoveCategory.PHYSICAL, 15, 100, 20, -1, 0, 3)
       .attr(MultiHitAttr),

src/data/pokemon-forms.ts

@@ -828,6 +828,12 @@ export const pokemonFormChanges: PokemonFormChanges = {
   [Species.EISCUE]: [
     new SpeciesFormChange(Species.EISCUE, "", "no-ice", new SpeciesFormChangeManualTrigger(), true),
     new SpeciesFormChange(Species.EISCUE, "no-ice", "", new SpeciesFormChangeManualTrigger(), true),
+  ],
+  [Species.CRAMORANT]: [
+    new SpeciesFormChange(Species.CRAMORANT, "", "gulping", new SpeciesFormChangeManualTrigger, true, new SpeciesFormChangeCondition(p => p.getHpRatio() >= .5)),
+    new SpeciesFormChange(Species.CRAMORANT, "", "gorging", new SpeciesFormChangeManualTrigger, true, new SpeciesFormChangeCondition(p => p.getHpRatio() < .5)),
+    new SpeciesFormChange(Species.CRAMORANT, "gulping", "", new SpeciesFormChangeManualTrigger, true),
+    new SpeciesFormChange(Species.CRAMORANT, "gorging", "", new SpeciesFormChangeManualTrigger, true),
   ]
 };
 

src/enums/battler-tag-type.ts

@@ -63,5 +63,7 @@ export enum BattlerTagType {
   ICE_FACE = "ICE_FACE",
   STOCKPILING = "STOCKPILING",
   RECEIVE_DOUBLE_DAMAGE = "RECEIVE_DOUBLE_DAMAGE",
-  ALWAYS_GET_HIT = "ALWAYS_GET_HIT"
+  ALWAYS_GET_HIT = "ALWAYS_GET_HIT",
+  GULP_MISSILE_ARROKUDA = "GULP_MISSILE_ARROKUDA",
+  GULP_MISSILE_PIKACHU = "GULP_MISSILE_PIKACHU"
 }