1) You need to do it via nintendo's website using a Nintendo account with NNID linked?
2) it means its been used before, its will have most likely have been reset to factory settings
3) Wii U consoles use a NNID
4) You can use the same as the 3DS
5) For GC games use Nintendont, for Wii...
Guys do we have a begging thread :P im looking for some golden tools and crowns for my island, but im playing this on my legit switch not my hacked one.