Lisa: Lisa is the main playable character, she can jump, kick, play her saxophone to stunt enemies, use the "Hand of Buddha" to pick up and drop big things and (only in the Xbox version) turn into Clobber Girl.
Bart: Bart is one of the playable characters, he can jump, kick, open his cape to release bats, use his slingshot, turn into Bartman to glide, climb walls and ziplines and (only in the Xbox version) turn into Robo-Bart.
Carl and Lenny: They fall from a tree and must be saved before they get to the spinning gears.
Lumbermen: Enemies throughout the level.
Mr. Burns and Smithers: They say comments throughout the level about Bart and Lisa destroying the factory and other things.