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Kirby Super Star
Legend of The Mystical Ninja, The
Pocky & Rocky 
Pop'n Twinbee 
Super Smash T.V. 
Total Carnage
Wild Guns 

I haven't actually played a game with a split screen.
If there's something I missed that isn't a fighting game/mario/beat'em and it isn't a total clusterfuck on the screen then let me know.