If you get (or got) MarioKart 8...

get yo self a free game, we all got time for dat!

http://www.nintendo.com/whatsnew/detail/Mf9RJDcWmALXECxUdPB0Lf3N9Jb2VtRt

And if you have an interest in one of those games and for some reason don't want Mario Kart, you can buy a code off ebay for ~$30.

Or if you have no interest in any of those games you can sell the code instead.

Snagged my copy of new super mario brothers U with my copy of MK8