Indeed there is a KH game. Kingdom Hearts: Dream Drop Distance, and I highly recommend this game. While it does feel like KH with Pokemon elements, those KH elements you loved aren't gone by any means. If anything, they added more to the feel.
I saw Super Mario 3D Land was put in here as well, and I must second that. If you're looking for a good hard Mario game in the later levels(When I say this, I mean you have to beat the game first to access special worlds), this is the one. If you beat every level and get every star coin, you get to play one of the hardest levels ever in a Mario game if not the hardest. Let me put it this way, I lost 400+ lives straight trying to finish that level.
Also, there's a new Monster Hunter coming out in 7 days...well, not new, but I guess a port from the Wii? Monster Hunter 3 Ultimate. I loved 3, I love Monster Hunter, so I imagine this will be great.
Mario Kart 7, definatly. So much fun.
As for the new Super Mario Bros. 2...this is my opinion, and I may need to play it again because admittedly, I did pretty much put it down after I beat it, but it felt WAY too easy. But, it's nonetheless a good Mario game that represents our favorite plumber very well. IF you were to ask me the best of the two, I would say 3D Land, but I'm just a guy who loves a good challenge.
Sorry to bombard you with text, but these are a few that come to mind.