The Wii Remote is a motion responsive controller that is the primary controller for Wii games. Included with the Nintendo Wii is one Wii Remote. If you use the Wii Remote on a different Wii system or want to add additional Wii Remotes (up to four can be used simultaneously), the Wii Remote(s) must be synced to the Wii. When sycning multiple Wii Remotes, each remote should be synced one at a time.
Turn on the Wii.
Open the SD card slot on the front of the Wii and press the "Sync" button.
Remove the battery cover on the Wii Remote and press the "Sync" button. The lights on both the Wii and Wii Remote will flash. Once the lights stabilise, this indicates that you have synced the Wii Remote.