They have a GBA version of Guilty Gear?! (rushes to search on ebay)
I never really heard of it untill I got Guilty Gear X2 Reload for the x-box. I really liked it. The graphics were awesome and the characters are sweet. I love there death moves and everything. its really hard to say who is my fav. I usually like the main character in a fighting game, but iono. Hard to say.
But the games rock!