Dragon Quest 5 and Metal Slug 7, awesome. I won't bother with DQV because I am waiting for the inevitable (PLEASE!) American version, but Metal Slug 7 is something I might try out now for the hell of it.
SMG2 is as clever and fun as the first one. The primary tangible change is to the 2-player mode, as the second person can now have a real affect on the game beyond collecting starbits. They can now spin attack (and often kill)