Things You'll Need
Instructions
Open the battery cover of the Wii remote you want to use as the second controller and insert the "AA" batteries.
Turn on the Nintendo Wii console.
Open the front cover (where the SD card goes).
Press the red "Sync" button under the front cover. This tells the Wii to search for the Wii remote you want to use.
Press the red "Sync" button in the battery cover to start the sync process. When the lights on the Wii controller stop flashing, the remote is synced.