Hmm. That would be cool. It would require a big new piece of proprietary technology to plug into the GBA, though.
It's funny, because even though I know a ton of people with GBAs, I've never done a multiplayer thing, mainly because no one I know has a link cable. *Sigh...* Maybe I oughtta get one o' my own.
Novel Idea, eh?
"Thus has it ever been! Thus shall it ever be!"