Instructions
Insert the "Marvel: Ultimate Alliance" game disc in your Xbox 360.
Scroll up to the "My Xbox" section of the Xbox 360 dashboard, select the game icon, and press "A" to start the game.
Locate the cheat code on the "Marvel: Ultimate Alliance" hints and cheats page (see Resources), and determine where you must enter the code. You can find this under the "Effect" column in parentheses. For example "Character Selection Screen" signals that you must enter the specified cheat in the character selection screen of the game. Navigate to the specified screen.
Enter the cheat code using the directional pad and buttons on the Xbox 360 controller. Enter code commands in quick succession (no longer than one second between the commands). You will hear a chime if the code is successful. If unsuccessful, enter it again.