I'm not really familiar with Power Stone, but from my understanding Combat Core is supposed to be that sort of thing.

Awesome advice on Airconsole. The actuall card game of Cards Against Humanity is something we've all played before so pretty safe bet there!

Yeah, I'm gonna have to thank you for "Use Your Words". This is gonna be a hands down hit with my group, I have no doubt in my mind.

Blast Brawl 2 apparently has up to 9 player local according to this: https://www.reddit.com/r/localmultiplayergames/comments/5jefql/blast_brawl_2_is_pure_blast/