AidenTheGamer
Senior Member
I have separate ones for 3DS and Wii U and I'd like to know how to link them and if I should.
I don't think you can link two already existing NNIDs. I only have experience with using a single NNID on both the 3DS and Wii U. Someone might prove me wrong in a moment though.
An advantage of doing it would be that you can add money from an eShop card and have the money accessible and able to be used on either system.
I'm not sure what will happen if you remove the NNID that originally purchased the licenses, which is why I haven't removed the first WiiU NNID I made.