The first Capcom fighter for the PSP is Darkstalkers.

User Rating: 7 | Vampire Chronicle: The Chaos Tower PSP
Darkstalkers Chronicle is a collection of Darkstalkers1,2,3 all together in one. The graphics are fantastic. The sound is one of the best I ever heard on the PSP. There's alot to unlock. There's a bunch of replay value here. The Ad Hoc is great if you have someone around with a PSP.
The only Complain is the Control. Why Sony didn't setup a better D-pad before releasing the PSP? The moves are impossible to perform so capcom did is that you could setup on the menu to pull a special move onto one button. WOW!! I mean WHAT????? (I heard SFA 3Max is the same way.) so sad. Just try adjusting to the control and you be good.....hopefully.