Superman - Shadow of Apokolips cheats and cheat codes for Gamecube

Enter the following codes at the cheat codes screen:

Change pick-up icons: Enter JUST FOR STEVE 
Easier Test Of Strength mode: Enter SORE FINGER
Empty Superpower meter: Enter JOR EL
Explore Metropolis mode: Enter WANDERER
Hardest difficulty: Enter NAILS
Infinite health: Enter FIRST AID
Infinite Superpower meter: Enter JUICED UP
Low resolution graphics: Enter PEA SOUP
Master code: Enter I WANT IT ALL
No time limits: Enter STOP THE CLOCK
Reversed controls: Enter SUPERMAN
Slow motion: Enter SLOW MOTION
Tomato soup mode: Enter TOMATO SOUP
Unlock all character biographies: Enter INTERVIEW
Unlock all intermission: Enter POPCORN
Unlock all level attack mode stages: Enter SIGHTSEEING
Unlock Clark Kent: Enter SECRET IDENTITY
Unlock Parasite: Enter FEELING DRAINED

Extras in options: Enter FEATURE

Extras in Explore Metropolis mode:
Enable the "Extras in options" cheat, then enter CREEP at the cheat screen

Reversed display:
Enable the "Extras in options" cheat, then enter DOWN UNDER at the cheat screen

Different credits:
Enable the "Extras in options" and "Extras in Explore Metropolis mode" cheat, 
then enter SGKEL341  at the cheat screen

Silent Movie mode:
Enable the "Extras in options" cheat, then enter RETRO at the cheat screen

Underwater mode:
Enable the "Extras in options" cheat, then enter WIBBLE at the cheat screen