2 physical: Mario Kart 8 and Splatoon
2 digital: Hyrule warriors and super Mario maker.

I'm going to trade in my physical games and buy the digitally instead. When you have a nephew at the age of 7, discs tend to get scratched :).

7 physical retail - Bayonetta 1-2,Super Smash Bros, MK8, Zombi U, Resident Evil Revelations, Wii Fit U and Ninja Gaiden 3 RE.
6 digital retail games - Pikmin 3, NSMB U, SMB 3DW, TLOZ WW HD, Splatoon and TW101.
4 Virtual Console games: SMB, Metroid Prime Trilogy, Shovel Knight and SMB 64.

Physical: Xenoblade Chronicles X

19 Physical Retail: New Super Mario Bros. U, Nintendo Land, Monster Hunter 3 Ultimate, New Super Luigi U, Pikmin 3, The Wonderful 101, The Legend of Zelda: The Wind Waker, Super Mario 3D World, Donkey Kong Country: Tropical Freeze, Mario Kart 8, Hyrule Warriors, Bayonetta, Bayonetta 2, Super Smash Bros. for Wii U, Captain Toad: Treasure Tracker, Kirby and the Rainbow Paintbrush, Splatoon, Yoshi's Woolly World, Super Mario Maker.

2 Virtual Console: Earthbound Beginnings, Earthbound.

3 Digital Only: Pulblox World, Mario vs. Donkey Kong: Tipping Stars, FAST Racing NEO.

24 Physical: Nintendo Land, Just Dance 4, Darksiders II, Wind Waker HD, Tekken Tag 2, Super Mario 3D World, ZombiU, The Wonderful 101, Mario Kart 8, Rayman Legends, Bayonetta, Bayonetta 2, Super Smash Bros., DKC Tropical Freeze, Wii Fit U, Captain Toad, LEGO City Undercover, Call of Duty BO II, Splatoon, Yoshi's Wolly World, Hyrule Warriors, Devil's Third, Super Mario Maker, Xenoblade Chronicles X

3 Digital Retail: Pikmin 3, Batman Arkham City, New Super Mario Bros. U

15 Virtual Console: Ice Climber, Galaga, Adventure Island, Megaman II, Super Metroid, F-Zero, Zelda ALttP, Earthbound, Metroid Fusion, Metroid Zero Mission, Golden Sun 2, Donkey Kong 64, Metroid Prime Trilogy, Xenoblade Chronicles, Brain Training

9 Digital Only: Trine 2, Nano Assault Neo, Art of Balance, FAST Racing Neo, Mighty Switch Force 2, Shovel Knight, Pullblox, World (Pushmo World), The Swapper

Zero, furthermore I found out that such a thing called "Wii U" exists here, on VGChartz.

18 physical. a few indies (I mainly get them on pc --> cheaper prices), and will be getting a bunch more. For comparison, I have 20 Wii games, 20 360 games, 30 ds/3ds games, 40 ps2 games, 40 SNES games, 20 og Xbox games, 3 ps4 games, and 4 Xbone games. 

Well Ok let's see here: 62 games: 8 physical; 16 Digital; 6 Digital Only; 32 VC

Physical: 8 games

ZombieU
Call of Duty: Black Ops II
Call of Duty: Ghosts
Nintendo Land
The Wonderful 101
Skylanders: Giants
Splatoon
Xenoblade Chronicles X

Digital: 16 games

New Super Mario U
Lego City Undercover
Ninja Gaiden 3: Razor's Edge
Injustice: Gods Among Us
Monster Hunter 3 Ultimate
Pikmin 3
Mario Kart 8
Sonic Lost World
Super Mario 3D World
Darksiders II
Bayonetta 2 (with Bayonetta, you had to "buy" it on the eShop but since the price came out to a fully priced game)
Rabbids Land
Batman: Arkham Origins
Super Smash Bros for Wii U
Assassin's Creed
Hyrule Warriors

Digital Only: (indies etc) 6 games

Metroid Trilogy
Nes Remix
Dr Luigi
Nano Assault Neo
Trine 2 Director's Cut
Mighty Switch Force! Hyper Drive Edition

VC Games: 32 games

Super Metroid
Super Mario Bros.
Super Mario Bros 2
Super Mario World
Golden Sun
Zelda Minish Cap
Earthbond
Earthbond Beginings
Zelda: A link to the past
Breath of Fire II
Kirby's Adventure
Harvest Moon
Super Ghouls and Ghosts
F-Zero
Mega Man
Mega Man II
Mega Man III
Mega Man IV
Mega Man V
Mega Man VI
Mega Man VII (Guess who isn't getting the Mega Man compilation)
Mega Man X
Mega Man X2
Mega Man Battle Network
Punch Out
Ghosts n' Goblins
Excitebike
Donkey Kong
Ice Climbers
Kid Icarus
Ballon Fight
Yoshi

Just got a WiiU, so only a single retail game ! :

Xenoblade Chronicles X

Congratulations! You are going to play an amazing game!