Nintendo Network accounts can only be used on the Wii U system where they were created. The company confirmed the news in a Wii U support page. This means players cannot access their accounts from a friend’s console or transfer information to a new Wii U should the system break, at least for now.
“A Nintendo Network Account can only be used on the console where it was created,” reads the statement. “In the future, you will be able to use your Nintendo Network Account with future Nintendo consoles and other devices, such as PC’s.”