Instructions
Open the door located on the front of the Wii. This window contains the SD Card slot.
Remove the battery cover on the back of the second Wii remote.
Press the button labeled "Sync" located under the battery cover on the back of the Wii remote.
Press the button labeled "Sync" located on the front of the Wii console. This button is located above the SD Card slot.
Look at the LED light on the front of your Wii remote. When the light finishes blinking, the synchronizing is complete.