Portable fighting games

Are any of them good?  I mean the lower resolution, smaller sprites, tiny controls, small screen, etc... I was thinking of getting Darkstalkers for example, but after playing SFA3 on GBA I'm not so sure.

I've heard of one called Jump Superstars for the DS.  People have said that one's good.

KAMEHAMEHA

Darkstalkers only looks pretty on PSP... I don't think it's that fun since they're so much smaller.