There is an old PS 1 game I really liked called "Martian Gothic" where you could play 3 different characters, and flip between them at anytime during the game.......The game itself only had some limited health cheats ever published, and those had to be written to a Gameshark disc to be inserted.......It had lots of mystery to solve, and overall was a really cool game.
Sort of like bully, you couldn't really "Kill" most of the enemy characters, they would always rise again after shooting them......
Being able to flip between different Bully characters is what I think would be nifty.