Death and Return of Superman
Cheat mode
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Play the "0B", "29", "2C", and "05" selections in order
on the sound test screen.
Full energy, life, and special powers
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Enable cheat mode and press A + B + X + Y during game play.
You will also be invincible during the missions when you fly
in the sky, shooting the robots.
Level skip
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Enable cheat mode, then hold A + B + X + Y and press Select
during game play.
Defeating the Bosses
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Use the following technique to defeat Doomsday and the other
Bosses quickly. Use Superman's eye beams, hand blasts, or other
special attacks. Time them to connect when the Boss is almost
on Superman. If done correctly, Superman will be able to hit
him until he falls. Then, repeat this process until the Boss
has been defeated.