Instructions
Start "Mario Kart Wii." Choose the appropriate license for your player profile.
Choose "Nintendo WFC," and select the number of players.
Select "Worldwide" to race against players from around the world, or "Regional" to race with people in your region.
Choose "VS" for races on the "Mario Kart Wii" tracks or "Battle" to engage in team battle mode. Select a "Mario Kart Wii" character and vehicle, and wait for your online game to begin.
Choose "Friend" from the Nintendo WFC menu to play online with people whose friend codes you've entered into your Wii. Select "Create a Room" to set up the details for your match, "Find a Friend" to see which of your friends are online or "Register a Friend" to add a new friend code.