Don't boost enemy trainer shiny odds with shiny charm

src/system/game-data.ts

@@ -253,7 +253,7 @@ export class GameData {
         scene.newArena(sessionData.arena.biome, true);
 
         sessionData.enemyParty.forEach((enemyData, e) => {
-          const enemyPokemon = enemyData.toPokemon(scene) as EnemyPokemon;
+          const enemyPokemon = enemyData.toPokemon(scene, battleType) as EnemyPokemon;
           battle.enemyParty[e] = enemyPokemon;
           if (battleType === BattleType.WILD)
             battle.seenEnemyPartyMemberIds.add(enemyPokemon.id);

src/system/pokemon-data.ts

@@ -1,3 +1,4 @@
+import { BattleType } from "../battle";
 import BattleScene from "../battle-scene";
 import { Gender } from "../data/gender";
 import { PokeballType } from "../data/pokeball";
@@ -69,10 +70,10 @@ export default class PokemonData {
     }
   }
 
-  toPokemon(scene: BattleScene): Pokemon {
+  toPokemon(scene: BattleScene, battleType?: BattleType): Pokemon {
     const species = getPokemonSpecies(this.species);
     if (this.player)
       return new PlayerPokemon(scene, species, this.level, this.abilityIndex, this.formIndex, this.gender, this.shiny, this);
-    return new EnemyPokemon(scene, species, this.level, this);
+    return new EnemyPokemon(scene, species, this.level, battleType === BattleType.TRAINER, this);
   }
 }