Since the other thread was basically "otter jacked", and to me this is an important topic, I thought I'd give it another crack (no, I'm not high on crack).

Unfortunately this isn't something I'm knowledgable with so I thought it would be cool if everyone could contribute.

So which GBA games support multiplayer? Which ones require two cartriges? Which ones allow for only one cartrige? Which games allow for more than two players to play at once?

As far as I know, Mario Kart Advanced allows for multiple (2?) players with one single cart. Is this for every track and such?

Also, Advanced Wars allows for 4 players to compete at once, but I'm unsure of the cartrige needs (is more than once necessary?).

Please contribute!