diff --git a/src/data/pokemon-evolutions.ts b/src/data/pokemon-evolutions.ts
index 9b7ffe4a46a..369257ccae3 100644
--- a/src/data/pokemon-evolutions.ts
+++ b/src/data/pokemon-evolutions.ts
@@ -1215,8 +1215,10 @@ export const pokemonEvolutions: PokemonEvolutions = {
     new SpeciesEvolution(Species.CLODSIRE, 20, null, null)
   ],
   [Species.PIKACHU]: [
-    new SpeciesFormEvolution(Species.ALOLA_RAICHU, "" || "partner", "", 1, EvolutionItem.THUNDER_STONE, new SpeciesEvolutionCondition(p => p.scene.arena.biomeType === Biome.ISLAND || p.scene.arena.biomeType === Biome.BEACH), SpeciesWildEvolutionDelay.LONG),
-    new SpeciesFormEvolution(Species.RAICHU, "" || "partner", "", 1, EvolutionItem.THUNDER_STONE, null, SpeciesWildEvolutionDelay.LONG)
+    new SpeciesFormEvolution(Species.ALOLA_RAICHU, "", "", 1, EvolutionItem.THUNDER_STONE, new SpeciesEvolutionCondition(p => p.scene.arena.biomeType === Biome.ISLAND || p.scene.arena.biomeType === Biome.BEACH), SpeciesWildEvolutionDelay.LONG),
+    new SpeciesFormEvolution(Species.ALOLA_RAICHU, "partner", "", 1, EvolutionItem.THUNDER_STONE, new SpeciesEvolutionCondition(p => p.scene.arena.biomeType === Biome.ISLAND || p.scene.arena.biomeType === Biome.BEACH), SpeciesWildEvolutionDelay.LONG),
+    new SpeciesFormEvolution(Species.RAICHU, "", "", 1, EvolutionItem.THUNDER_STONE, null, SpeciesWildEvolutionDelay.LONG),
+    new SpeciesFormEvolution(Species.RAICHU, "partner", "", 1, EvolutionItem.THUNDER_STONE, null, SpeciesWildEvolutionDelay.LONG)
   ],
   [Species.NIDORINA]: [
     new SpeciesEvolution(Species.NIDOQUEEN, 1, EvolutionItem.MOON_STONE, null, SpeciesWildEvolutionDelay.LONG)