Really? People are actually replying to this thread and you want to squash it?
Anyway... I always like ZooCube. Cute little puzzle game that no one every talks about.
Zelda Four Swords is a fantastic party game if you can round up enough link cables and GBAs to play it properly.
Space Raiders is a neat Space Invaders reboot.
Alien Hominid is a fun (hard) beat-em-up from the people that made Castle Crashers.
And it's been mentioned, but seriously, Eternal Darkness is a great game.
As is Chibi-Robo.