kotaku.com: You'd think that would be something Nintendo could manage rather easily, but nope. Turns out that the Nintendo Network ID you create for a Wii U will, for now at least, is tied to that console. If you lose that console - for whatever reason - you lose the ID that went with it. If you buy a second-hand console, and want to import your ID, you can't. If you're at a friend's house and want to sign on using your account, you can't.