diff --git a/src/field/pokemon.ts b/src/field/pokemon.ts
index 8181e52357c..edf8265b5b5 100644
--- a/src/field/pokemon.ts
+++ b/src/field/pokemon.ts
@@ -1795,7 +1795,7 @@ export default abstract class Pokemon extends Phaser.GameObjects.Container {
     return (atkScore + defScore) * hpDiffRatio;
   }
 
-  getEvolution(): SpeciesFormEvolution | FusionSpeciesFormEvolution | null {
+  getEvolution(): SpeciesFormEvolution | null {
     if (pokemonEvolutions.hasOwnProperty(this.species.speciesId)) {
       const evolutions = pokemonEvolutions[this.species.speciesId];
       for (const e of evolutions) {
diff --git a/src/phases/evolution-phase.ts b/src/phases/evolution-phase.ts
index 55090487176..36bd3b7bd81 100644
--- a/src/phases/evolution-phase.ts
+++ b/src/phases/evolution-phase.ts
@@ -35,7 +35,7 @@ export class EvolutionPhase extends Phase {
   protected pokemonEvoSprite: Phaser.GameObjects.Sprite;
   protected pokemonEvoTintSprite: Phaser.GameObjects.Sprite;
 
-  constructor(scene: BattleScene, pokemon: PlayerPokemon, evolution: SpeciesFormEvolution | FusionSpeciesFormEvolution | null, lastLevel: integer) {
+  constructor(scene: BattleScene, pokemon: PlayerPokemon, evolution: SpeciesFormEvolution | null, lastLevel: integer) {
     super(scene);
 
     this.pokemon = pokemon;