Wii U - Nintendo ID confined to system it was created on.

[Kenology]

Lusche said:

Kenology said:

You'll have to recreate your account and readd your friends, but I'm sure they'll let you keep the games you bought and paid for. 

This is why this is only a temporary issue.  Nintendo will have a fix for this shortly.

of course they will add that in the future. Hopefully this will be an easy system like the ms one or sony one or even better.
but right now as it is its not good.

A system update is all it'll take.  Just like the one that let you boot games from memory cards on the Wii in the "clean out your fridge" days.