hmmm there are things I'd like to see on the GBA... but it wouldn't do the games justice to have the graphics downgraded to fit on the GBA...

But as far as a game that would be nice, in handheld format.
Katamari Damacy!!! (anyone know this one? if not go spend $20 and get it.)lol
I would love to see that game on the N DS! (its rumored to someday show up on it.) lol