Instructions
Flip over your Wii board controller so you can see the bottom. Here you will see a battery compartment. Insert the four AA batteries that came with your Wii Fit into this compartment. Do not flip your Wii board controller back over.
Turn on your Nintendo Wii console. Put your "Wii Fit" game disc into your Wii. Your Wii fit game disc will load.
Press the "Sync" button located on the bottom of your Wii Fit board controller, inside the battery compartment. Once you press this button, replace the battery cover and turn the board controller back over.
Press the "Sync" button on the front of your Wii. This is the same sync button you use to sync controllers. Once you've done this, your "Wii Fit" is properly installed on your Nintendo Wii game console.