■A Castlevania game (other than Dawn of Sorrow, which I have and love)
Get Castlevania:Portrait of Ruin Its a fun romp much like DoS - Do not get Order of Ecclessia. This game is hard as balls and will make you want to jump in front of moving traffic to end your frustration.
■Bust a Move 3DS (didn't get the most glowing review here, but I'm sure I'd like it)
Fun but forgettable. You know you will play it for an hour or two and never put it back in your 3DS again. You know it!
■Sonic Colors DS
Tj already touched on this. Fun but short.
■Atari Collection vol. 2 (couldn't find volume one)
See Bust a Move 3D comment.
Castlevania it likely is!