Graphical quality goes a long way on the small screen in King of Fighters EX: Neoblood. Never mind the fact that 11-year-old hardware powers every arcade KOF title out there -- attempting to match the real thing isn't easy on the GBA, but they nailed it. Familiar settings include the dinosaur museum, Kim's training area and Geese's lair (also seen in the Dreamcast's King of Fighters Evolution) in crisp, clear detail. Each character carries enough animation frames to seem more fluid than robotic, and most look exactly like sized-down rips from previous games. That's a good thing, by the way.
Can't really say much for the sound department, though. I've heard better music on the Game Boy Color years ago, and the horribly digitized voices nearly ruin the entire experience. A quick general rule all handheld developers should follow: digitized audio will always carry a terrible modulated ring sound with it, and that's never pretty. I highly recommend playing this game with the sound turned down completely, after hearing a few seconds for yourself.