Activate the following cheats by entering the corresponding sequences of buttons at the "Hero Details" or "Team Select" menu:

CHEAT FUNCTION - CHEAT CODE
All Dossiers - At the main menu, press DOWN(3), RIGHT(2), LEFT, DOWN, START.
All movies - At the main menu, press UP, LEFT(2), UP, RIGHT(2), UP, START.
All diaries - At the main menu, press LEFT, RIGHT(2), LEFT, UP(2), RIGHT, START.
Extra money - At the "Hero Details" menu, quickly press UP(2), DOWN(2), UP(3), DOWN, START.
All Fusions - While playing, press RIGHT(2), UP, DOWN, UP(2), LEFT, START.
All powers - While playing, quickly press UP(2), DOWN(2), LEFT, RIGHT(2), LEFT, START.
All skins - While playing, press UP, DOWN, LEFT, RIGHT, LEFT, RIGHT, START to unlock all skins.
All heroes - While playing, press UP(2), DOWN(2), LEFT(3), START to unlock all heroes.
Play as Hulk - While playing, quickly press DOWN, LEFT(2), UP, RIGHT, UP, DOWN, LEFT, START.
Play as Jean Grey - While playing, press LEFT(2), RIGHT(2), UP, DOWN, UP, DOWN, START.
Play as Thor - While playing, press UP, RIGHT(2), DOWN, RIGHT, DOWN, LEFT, RIGHT, START.