Uhhh, I don't know. It would be criminal not to have it, though. xD

Salt and Sanctuary, though, guys....

Just checked it. It has a two player versus mode. That could work I guess.

You said Street Fighter doesn't have blood, how much more or less violent is it compared to Smash? Significantly more, little more, about the same?

About the same? The graphical display is similar, although the style and substance is different. Depends on how you want to look at it. I wouldn't call Smash a violent game, to be fair, even though you use violence to defeat other opponents. In that regard, I'd say Street fighter is a bit more violent than Smash.

Not sure if it's on WiiU or not:

Tiny Brains
Chariot
Never Alone

Also, there is a good site for checking out co-op games (local co-op is under "couch co-op" checkbox):

http://www.co-optimus.com/games.php

Haha that's rated M though. Not going to fly unfortunately 

Resogun is the best advice i can give you. That game is awesome.

I know you are already considering rocket league, I'm just gonna reassure that you are in the right track, that game is so much fun...

Rocket League, Worms Battleground, Towerfall Ascension, Tetris Ultimate, PES 2016, wish there was a cool crazy golf game like the 3d golf games of Xbox 360.

Thanks for all the input everyone. I'm thinking I'll go with Rocket League, Resogun, and maybe Street Fighter V.

Geometry Wars 3! Geometry Wars 3!!