Input the codes in the appropos section/screen listed:
Main or Save Zone screen
All characters - UP, UP, DOWN, DOWN, LEFT, LEFT, LEFT.
All powers unlocked (current party) - LEFT, RIGHT, LEFT, RIGHT, UP, DOWN, UP, DOWN, LEFT, RIGHT, START.
All costumes unlocked - UP, DOWN, UP, DOWN, LEFT, RIGHT, LEFT, RIGHT, UP, DOWN, START.
Save Zone screen (delete all current party members)
Daredevil available - LEFT, LEFT, RIGHT, RIGHT, UP, DOWN, UP, DOWN, START.
Silver Surfer available - DOWN, LEFT, LEFT, UP, RIGHT, UP, DOWN, LEFT, START.
Review screen
All cinematics - UP, LEFT, LEFT, UP, RIGHT, RIGHT, UP, START.
All comic covers - LEFT, RIGHT, RIGHT, LEFT, UP, UP, RIGHT, START.
All concept art - DOWN, DOWN, DOWN, RIGHT, RIGHT, LEFT, DOWN, START.
All wallpapers - UP, DOWN, RIGHT, LEFT, UP, UP, DOWN, START.
100K (Team Menu) - Up, Up, Up, Left, Right, Left, Start
Level 99 (Team Menu) - Up, Left, Up, Left, Down, Right, Down, Right, Start
All Comic Book Mission Coarses (Comic Book Missions) - Up, Right, Left, Down, Up, Right, Left, Down, Start
All Cinematics (Review Menu) - Up, Left, Left, Up, Right, Right, Up, Start
All Comics (Review Menu) - Left, Right, Right, Left, Up Up, Right, Start
All Concept Art (Review Menu) - Down, Down, Down, Right, Right, Left, Down, Start
All Wallpapers (Review Menu) - Up Down, Right, Left, Up, Up, Down, Start
All Characters (Team Menu or Hero Management Menu) - Up, Up, Down, Down, Left, Left, Left, Start
All Costumes (Team Menu or Hero Management Menu) - Up, Down, Up, Down, Left, Right, Left, Right, Up, Down, Start
All Powers (Team Menu or Hero Management Menu) - Left, Right, Left, Right, Up, Down, Up, Down, Left, Right, Start
Filler (While In Game) - Left, Right, Right, Left, Up, Down, Down, Up, Start
God Mode (While In Game) - Up, Down, Up, Down, Up, Left, Down, Right, Start
Super Speed (While In Game) - Up, Left, Up, Right, Down, Right, Start
Touch of Death (While In Game) - Left, Right, Down, Down, Right, Left, Start
Unlocks the Silver Surfer - Down, Left, Left, Up, Right, Up, Down, Left, Start
Unlocks Daredevil - Left, Left, Right, Right, Up, Down, Up, Down, Start