ZyroXZ2 on 17 March 2014
1) All depends on the game; if the game developers don't keep regional servers separate from each other, then you sure can. Mario Kart Wii was global, and I'm sure Mario Kart 8 will be, too!
2) Nope, region locked
3) I know Nintendo can transfer an ID to a new system (my ex had this done, they transferred her ID and all her eShop purchases over to a new system), but I'm NOT sure if this works across regions. It's possible that since the systems are region locked, an ID created in one region may not be able to transfer to another one. Nintendo has some very quirky tie-ins with the consoles, so I'm not sure if the region has an effect on ID transfers...
