Doesn't a retro system at least have to be 10 years old or something? I mean the Wii U is only barely 4 years old. No one considered Wii retro in 2010.
Anyway I only have like 6 games on the system so the top 12 games is kinda impossible for me but here it goes.
1. Super Smash Bros 4
2. Xenoblade X
3. Pikmin 3
4. Mario Kart 8
5. Everything Else (Ok I will post the others)
5. Donkey Kong Country Tropical Freeze
6. The Legend of Zelda: Wind Waker HD Edition