Wii Compatibility with GameCube Games: Up to four (4) of these same controllers can be plugged directly into the Wii console when enjoying Nintendo GameCube game discs on your Wii. Note: GameCube controllers only work when playing GameCube games on the Wii console. Exceptions to this include Super Smash Bros. and Mario Kart, both of which allow you to use your GameCube controllers. It's possible there are or will be other exceptions. Check your games' instruction books to be sure.