Yes, I remember it. Pretty fun, but kind of a Mortal Kombat rip-off (with out the fatalities). As for a new Gamecube game, I don't think so. The game was made by Rare (the creators of Banjo-Kazooie and Conker's BFD), and since Rare was sold by Nintendo, and bought by Microsoft, it will more likely come to the Xbox. But then again, Nintendo still owns like 40% of Rare, so the can also make it for GBA (with the help of THQ). Also, did you know there having a new game for the GBA called Sabre Wulf? I think it's were you play a scientist on a chase for the wolf from Killer Instinct.
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Luigi hated it when he craped his pants. Boo!
