Must-have PSP games..?

PATAPON!!! One of the best PSP games ever! Only $20! Another good one would be Monster Hunters Freedom 2(u said u had it but u didn't say number 1 or 2). A good fighting game would be the new Naruto. The story sucks, but the gameplay kicks @$$. Oh, and Disgaea. Hilarious storyline and good strategic gameplay. But whatever you do, DON'T buy rainbow six vegas for the psp. Or ghost recon advanced warfighter 2.