If you want to unlink your Nintendo Network ID from an old Wii U, there are a few steps you need to take. First, go to the System Settings on your Wii U. Second, select “Users” from the main menu. Third, select the user you want to unlink your ID from and press A on the controller. Fourth, select “Change User” from the options that appear. Fifth, enter your new user name and password and press A again. You’re now ready to start using your new account! ..