The Death and Return of Superman

Refill Life Bar and Special Attacks, Nine Lives, and Level Skip
Before starting a new game, go into the sound test in the Options menu. Play these sounds in the following order: 0B, 29, 2C, and 05. Then start a new game, and press A, B, X, and Y simultaneously any time during play. Your life bar will refill and you will get five special attacks. To skip levels press A, B, X, Y, and Select anytime during play.