Instructions
Turn on your Nintendo Wii and your wireless Nintendo GameCube controller.
Press the Nintendo Wii's "Sync" button (located on the front of the console).
Press the "Sync" button on your GameCube controller. Hold down this button until you feel the controller gently rumble in your hands. Your wireless GameCube controller is now synchronized with your Nintendo Wii; you can use it to play GameCube games on your Wii.