Currently Online 
Uhm... Let's see...
Retail:
ZombiU
Nintendoland
New Super Mario Bros. U
New Super Luigi U
Mario Kart 8
Super Mario 3D Land
The Wind Waker HD
Hyrule Warriors
Batman: Arkham Origins
Super Mario Maker
Captain Toad Treasure Tracker
Digital:
Sonic Lost World (MK8 promo)
Other Downloadables:
Art Academy Sketchpad
Child of Light
Virtual Console: (all except the last two from the Famicom 30th Anniversary promo (forgot to get Balloon Fight), last from Club Nintendo)
F-Zero (SNES)
Punch-Out (NES)
Kirby's Adventure (NES)
Super Metroid (SNES)
Yoshi (NES)
Donkey Kong (NES)
Super CastleVania IV (SNES)
Mario & Luigi Superstar Saga (GBA)
So;
Retail: 9 10
Digital: 1
Other DL: 2
Virtual Console: 7 8
Total: 19 21
Which is a pretty sucky score, because I have the system since launch day and especially since all those VC games and the Digital one were either free or extremely cheap due to promotions. So I really bought only 11 13 games.
EDIT: I actually forgot two. I got Castlevania IV on VC because I was bored, and I got Batman Arkham Origins retail because it was dirt cheap. Corrected the rest of the post to reflect this, which makes it a little less sucky, but still quite sucky nevertheless.
