Can I Log Into My Nintendo Network ID on a Different Console?
Wii U
A Nintendo Network ID can be linked to one Wii U and one system in the Nintendo 3DS family at a time. This means that it can be created on a Wii U and then linked to a Nintendo 3DS, or vice versa.
Wii U Transfers
Once a Nintendo Network ID has been associated to a Wii U, it can be moved to a different Wii U by performing a System Transfer.
Nintendo 3DS Family
Once a Nintendo Network ID has been associated to a Nintendo 3DS, it can be moved to a different Nintendo 3DS by performing a System Transfer.