diff --git a/src/field/pokemon.ts b/src/field/pokemon.ts
index f630cc16a48b..433bbf0203d5 100644
--- a/src/field/pokemon.ts
+++ b/src/field/pokemon.ts
@@ -135,10 +135,10 @@ export default abstract class Pokemon extends Phaser.GameObjects.Container {
       // If abilityIndex is not provided, determine it based on species and hidden ability
       if (species.abilityHidden && hasHiddenAbility) {
         // If the species has a hidden ability and the hidden ability is present
-        this.abilityIndex = species.ability2 ? 2 : 1; // Use ability index 2 if species has a second ability, otherwise use 1
+        this.abilityIndex = 2;
       } else {
         // If there is no hidden ability or species does not have a hidden ability
-        this.abilityIndex = species.ability2 ? randAbilityIndex : 0; // Use random ability index if species has a second ability, otherwise use 0
+        this.abilityIndex = species.ability2 !== species.ability1 ? randAbilityIndex : 0; // Use random ability index if species has a second ability, otherwise use 0
       }
     }
     if (formIndex !== undefined) {