Add reviver seed item (untested)

src/battle-phases.ts

@@ -5,7 +5,7 @@ import { allMoves, applyMoveAttrs, BypassSleepAttr, ChargeAttr, applyFilteredMov
 import { Mode } from './ui/ui';
 import { Command } from "./ui/command-ui-handler";
 import { Stat } from "./data/pokemon-stat";
-import { BerryModifier, ContactHeldItemTransferChanceModifier, ExpBalanceModifier, ExpBoosterModifier, ExpShareModifier, ExtraModifierModifier, FlinchChanceModifier, HealingBoosterModifier, HitHealModifier, LapsingPersistentModifier, MapModifier, MultipleParticipantExpBonusModifier, PokemonExpBoosterModifier, PokemonHeldItemModifier, SwitchEffectTransferModifier, TempBattleStatBoosterModifier, TurnHealModifier, TurnHeldItemTransferModifier } from "./modifier/modifier";
+import { BerryModifier, ContactHeldItemTransferChanceModifier, ExpBalanceModifier, ExpBoosterModifier, ExpShareModifier, ExtraModifierModifier, FlinchChanceModifier, HealingBoosterModifier, HitHealModifier, LapsingPersistentModifier, MapModifier, MultipleParticipantExpBonusModifier, PokemonExpBoosterModifier, PokemonHeldItemModifier, PokemonInstantReviveModifier, SwitchEffectTransferModifier, TempBattleStatBoosterModifier, TurnHealModifier, TurnHeldItemTransferModifier } from "./modifier/modifier";
 import PartyUiHandler, { PartyOption, PartyUiMode } from "./ui/party-ui-handler";
 import { doPokeballBounceAnim, getPokeballAtlasKey, getPokeballCatchMultiplier, getPokeballName, getPokeballTintColor, PokeballType } from "./data/pokeball";
 import { CommonAnim, CommonBattleAnim, MoveAnim, initMoveAnim, loadMoveAnimAssets } from "./data/battle-anims";
@@ -1729,7 +1729,19 @@ export class FaintPhase extends PokemonPhase {
   start() {
     super.start();
 
-    this.scene.queueMessage(getPokemonMessage(this.getPokemon(), ' fainted!'), null, true);
+    const pokemon = this.getPokemon();
+
+    const instantReviveModifier = this.scene.applyModifier(PokemonInstantReviveModifier, this.player, this.getPokemon()) as PokemonInstantReviveModifier;
+
+    if (instantReviveModifier) {
+      if (!--instantReviveModifier.stackCount)
+        this.scene.removeModifier(instantReviveModifier);
+      this.scene.updateModifiers(this.player);
+      this.end();
+      return;
+    }
+
+    this.scene.queueMessage(getPokemonMessage(pokemon, ' fainted!'), null, true);
 
     if (this.player) {
       const nonFaintedPartyMemberCount = this.scene.getParty().filter(p => !p.isFainted()).length;
@@ -1739,8 +1751,6 @@ export class FaintPhase extends PokemonPhase {
         this.scene.unshiftPhase(new SwitchPhase(this.scene, this.fieldIndex, true, false));
     } else
       this.scene.unshiftPhase(new VictoryPhase(this.scene, this.battlerIndex));
-      
-    const pokemon = this.getPokemon();
 
     pokemon.lapseTags(BattlerTagLapseType.FAINT);
     this.scene.getField().filter(p => p && p !== pokemon).forEach(p => p.removeTagsBySourceId(pokemon.id));

src/modifier/modifier-type.ts

@@ -561,6 +561,9 @@ const modifierTypes = {
 
   SACRED_ASH: () => new AllPokemonFullReviveModifierType('SACRED ASH'),
 
+  REVIVER_SEED: () => new PokemonHeldItemModifierType('REVIVER SEED', 'Revives the holder for 1/2 HP upon fainting',
+    (type, args) => new Modifiers.PokemonInstantReviveModifier(type, (args[0] as Pokemon).id)),
+
   ETHER: () => new PokemonPpRestoreModifierType('ETHER', 10),
   MAX_ETHER: () => new PokemonPpRestoreModifierType('MAX ETHER', -1),
 
@@ -723,6 +726,7 @@ const modifierPool = {
     new WeightedModifierType(modifierTypes.MAX_LURE, 4),
     new WeightedModifierType(modifierTypes.ATTACK_TYPE_BOOSTER, 4),
     new WeightedModifierType(modifierTypes.TM_ULTRA, 5),
+    new WeightedModifierType(modifierTypes.REVIVER_SEED, 3),
     new WeightedModifierType(modifierTypes.CANDY_JAR, 3),
     new WeightedModifierType(modifierTypes.GRIP_CLAW, 2),
     new WeightedModifierType(modifierTypes.HEALING_CHARM, 1),

src/modifier/modifier.ts

@@ -666,6 +666,32 @@ export class PreserveBerryModifier extends PersistentModifier {
   }
 }
 
+export class PokemonInstantReviveModifier extends PokemonHeldItemModifier {
+  constructor(type: ModifierType, pokemonId: integer, stackCount?: integer) {
+    super(type, pokemonId, stackCount);
+  }
+
+  matchType(modifier: Modifier) {
+    return modifier instanceof PokemonInstantReviveModifier;
+  }
+
+  clone() {
+    return new PokemonInstantReviveModifier(this.type, this.pokemonId, this.stackCount);
+  }
+
+  apply(args: any[]): boolean {
+    const pokemon = args[0] as Pokemon;
+
+    pokemon.scene.unshiftPhase(new PokemonHealPhase(pokemon.scene, pokemon.getBattlerIndex(), Math.max(Math.floor(pokemon.getMaxHp() / 2)), getPokemonMessage(pokemon, ` was revived\nby its ${this.type.name}!`), false));
+
+    return true;
+  }
+
+  getMaxStackCount(): integer {
+    return 10;
+  }
+}
+
 export abstract class ConsumablePokemonModifier extends ConsumableModifier {
   public pokemonId: integer;