About these Bitmap games, Speedball looks scaringly close to teh Megadrive version, which is bad news
And the development team is Crawfish, a team I love to hate for their sub-standard releases (just take a look at Street Fighter Alpha GBC)... It doesnt help that they are making SFA3 for the GBA... Capcom must be nuts.
And, sorry, but GBA emulation is just pish. Even if the machine's hardware gets 100% emulated... how can you compare playing the thing on a pc screen to playing it on the bus while you go to work? I'd say teh cash you spend on a GBA is cash well spent, and if you feel like pirating the hell out of it, dont use an emulator, use a dev unit.