Small Jim:
Hold Z and press C-Up, C-Down, Left at the title
screen, then begin game play.
Earthworm Kim:
Collect 1000 marbles and successfully complete the game with a Smart
Superhero rank to unlock Earthworm Kim. The difficulty of the game will increase
when played as Earthworm Kim.
Unlimited lives:
Go outside the entrance to "Hungry Tonight?" Collect the Power
Parp Tin from Snott and use it to collect the nearby extra life. Enter
"Hungry Tonight?" and immediately exit. Talk to Snott again to get
another Power Parp Tin, then collect the extra life again. Repeat this to get as
many extra lives as needed.