Things You'll Need
Instructions
Turn the Wii on. Make sure your Internet connection is active.
Select the envelope icon in the lower right corner of the Wii channel screen. This will take you to the Wii Message Board.
Select and open the address book. Choose "Wii address."
Enter your friend's Wii code. Select "OK" when you are finished.
Select a nickname for the Wii code. You can also create and add a Mii for this specific Wii code if you'd like.