Fantastic Four Codes -

Unlimited cosmic power:
Press , (x3), , , at the main menu. A sound will confirm correct code entry.

Hell bonus level:
Quickly press (x2), , , , , at the main menu. A sound will confirm correct code entry.
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Barge arena and Stan Lee Interview #1:
Quickly press , , , (x2), , at the main menu. A sound will confirm correct code entry.

See the Fantastic Four's Ultimate costumes:
Enable the "Hell bonus level" code. When you start, Sue (and Ben if playing in co-op mode) will be in their Ultimate costumes. REMEMBER: When you get to the rest of the Fantastic Four at the end of the level, they are also in their Ultimate costumes.

Change costumes:
Complete any training level. When done, turn off the game then complete the training level again. Complete level one on the same file. Turn off the game immediately after completing level one. Your costumes will either be red or black, depending on the version of the game.