a lot..

mario kart 8, 

mario 3D world,

DK TF

nes remix 1 y 2

earthbound

child of light

little inferno

mutant mudds

trine

runner

I'll update later... too late to post...

Too many to list

I have 3679pts in the deluxe digital promotion

Most of my games are physical copies but the ones I do have are
Mega Man 2
Earthbound
Minish Cap
Wario Land
Paper Mario (On Wii Mode)
Wii Party U, I got this one for free with MK8

Non-VC:
Trine 2
Little Inferno
Ducktales
Child of Light
NES Remix
NES Remix 2
Pushmo World
Toki Tori
Toki Tori 2
Guacamelee

Virtual Console
The Legend of Zelda A Link to the Past
Super Metroid
Super Mario World
Mega Man X
Mega Man X2
Castlevania 4
Earthbound
Golden Sun
Advance Wars
Mario and Luigi Superstar Saga
Super Punch-Out
Brain Training(forced upon me by Nintendo, didn't pay anything though)

So 22 games

Only one real game. I also got the Virtual Console promotion games that were 30 cents each at the time (but I missed the first one) and the pinball game when it was free to download, plus a couple demoes. Naturally I also have what Nintendo put on my WiiU, like Brain Training, but I won't monition them here.

For the Mario Kart promotion I got Sonic, not because of the game (it's pretty mediocre indeed), but because I wanted the Zelda DLC. I wasn't really interested in anything else, and the things I was interested in I already had as a retail copy. Except W101, but if I ever get that game, I also want it retail because I like the box-art.

Anyway:

Full games
Child of Light

Mini-games
Zen Pinball

Virtual Console
F-Zero
Punch-Out!
Kirby's Adventure
Super Metroid
Yoshi
Donkey Kong

They technically already are tied to the purchasing ID so when the full game to system policy comes out, it will retroactively apply to anything purchased under a NNID.

The problem is, as of now only one NNID can be used per console. I have 2 3DSs and a Wii U, so it's hard keeping track of which purchase goes on which account. I buy digital for everything not Nintendo, but having 3 different NNIDs is hard to work with (I got my 3DSs and Wii U beofre they made the Wii-to-3DS policy)

NES/SNES 30 cent promotion games (Donkey Kong, Balloon Fight, Punch-Out!!, Yoshi, Super Metroid, F-Zero, and Kirby's Adventure)
Super Mario World
Super Mario Bros. 2
Little Inferno
EarthBound
Super Mario Bros.
Mario Bros.
NES Remix
Advance Wars
Pikmin 3 (MK8 deal)
Pushmo World

I guess quite a lot.

I've got 7:

Dr. Luigi

Super Mario World

Wii Sports Club

Donkey Kong Country Tropical Freeze

Another World

Zelda wind Waker HD

Nes Remix

Oh god... hmm 33, though if you want to include stuff in Wii Mode, much more.

- Wii Fit U
- Art Academy
- Cloudberry Kingdom
- Ducktales Remastered
- Giana Sister's: Twisted Dreams
- Block Drop U
- Zen Pinball 2
- Super Mario Bros 3
- Mega Man
- Super Mario World
- F-Zero
- Yoshi
- Earthbound
- Super Metroid
- Kirby's Dreamland
- Balloon Fight
- Super Ghouls and Ghost
- Super Castlevania IV
- Super Mario Bros 2 (not lost levels)
- Punch Out
- Kirby Super Star
- Donkey Kong
- Pikmin 3
- Lego City Undercover
- A legend of Zelda: A Link to the Past
- Another World Out of this World
- The Cave
- Bit Trip Presents Runner 2: Future Legend of Rhythm Alien
- Trine 2
- Dr. Luigi
- Donkey Kong Country Tropical Freeze
- Yoshi's Island GBA
- Pushmo World