Play as Earthworm Kim
To play a much harder version of the game as Earthworm Kim, collect 1,000 marbles and complete the game with a Smart Superhero rank.
(Thanks to HunroeHH@aol.com)

Small Jim
To make Earthworm Jim small, hold Z and press C-Up, C-Down, and then Left at the title screen.
(Thanks to HunroeHH@aol.com)

Unlimited Lives
Outside the entrance of Hungry Tonight will be Snott with a Power Parp Tin. Get it from him and use it to get the nearby extra life. Now go into Hungry Tonight and immediately leave. Talk to Snott again to get another Power Parp Tin. Again, use it to get the extra life. Repeat this until you have lots of extra lives.
(Thanks to HunroeHH@aol.com)

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