Mario kart (if you play online) and witcher 3

(Link to the Past)
(Earthbound)
Mario 3D World
Mario Kart 8
Bayonetta 2
Pikmin 3

Can't really try to help you with PS4, though!

Yeah iv been thinking mk8 and witcher

Witcher 3 and Mario Kart 8 or 3D World.
Depends if u like single or multiplayer games more!

Bayonetta 2. You get 2 games for the price of one. Plus they're good games.

Diablo 3.

Runner up: The Witcher 3

I would rank Wii U games like this 

4:Donkey Kong Country Tropical Freeze

3:Tropical freeze

2:Tropical Freeze

1: DONKEY KONG COUNTRY TROPICAL FREEZE!! Buy it, if you havent already, but from those you listed, I would say mario kart 8 is the best one, even though bayonetta 2 is awsome

wii u : Bayonetta 2 or Mario Kart.
ps4: Dark souls 2 or Witcher 3.

Wii U: Mario Kart 8
PS4: The Witcher 3 or Dark Souls 2

Dark Souls 2 is a solid title, i bought it this week