diff --git a/src/field/pokemon.ts b/src/field/pokemon.ts
index d47cbedbade..58396c59fa6 100644
--- a/src/field/pokemon.ts
+++ b/src/field/pokemon.ts
@@ -3981,7 +3981,8 @@ export class PlayerPokemon extends Pokemon {
       let compatible = false;
       for (const p of tmSpecies[tm]) {
         if (Array.isArray(p)) {
-          if (p[0] === this.species.speciesId || (this.fusionSpecies && p[0] === this.fusionSpecies.speciesId) && p.slice(1).indexOf(this.species.forms[this.formIndex]) > -1) {
+          const [pkm, form] = p;
+          if ((pkm === this.species.speciesId || this.fusionSpecies && pkm === this.fusionSpecies.speciesId) && form === this.getFormKey()) {
             compatible = true;
             break;
           }
diff --git a/src/test/field/pokemon.test.ts b/src/test/field/pokemon.test.ts
index f7c1cf8bc3d..225f302ff0c 100644
--- a/src/test/field/pokemon.test.ts
+++ b/src/test/field/pokemon.test.ts
@@ -3,6 +3,7 @@ import { afterEach, beforeAll, beforeEach, describe, expect, it } from "vitest";
 import GameManager from "../utils/gameManager";
 import { PokeballType } from "#app/enums/pokeball";
 import BattleScene from "#app/battle-scene";
+import { Moves } from "#app/enums/moves";
 
 describe("Spec - Pokemon", () => {
   let phaserGame: Phaser.Game;
@@ -63,4 +64,15 @@ describe("Spec - Pokemon", () => {
       });
     });
   });
+
+  it("should not share tms between different forms", async () => {
+    game.override.starterForms({ [Species.ROTOM]: 4 });
+
+    await game.classicMode.startBattle([Species.ROTOM]);
+
+    const fanRotom = game.scene.getPlayerPokemon()!;
+
+    expect(fanRotom.compatibleTms).not.toContain(Moves.BLIZZARD);
+    expect(fanRotom.compatibleTms).toContain(Moves.AIR_SLASH);
+  });
 });