Activate the following cheats by entering the corresponding codes at the cheat entry screen. Note: There are two variations of the game; one with a black suited Spider-Man on the cover, and one without. Not all codes work in each version, and codes can vary between versions:

CHEAT FUNCTION - CHEAT CODE
Infinite shard duration cheat - 742737
Grounded cheat (hovering disabled in Battle mode) - 476863
No Blocking cheat - 888888
One Hit Kills cheat - 663448
Super Knockback cheat - 777777
Captain America; US Agent costume - 925627 or 956278
Captain America; Ultimate Captain America costume - 177674
Doctor Doom; Ultimate Doctor and Professor Doom costumes - 999999
Falcon; Ultimate Falcon costume - 666666
Iron Man; War Machine costume - 111111
Silver Surfer; Anti-Surfer and Gold Surfer costumes - 555555
Spider-Man; Symbiote Spider-Man costume - 925678 or 925628
The Hulk; Grey Hulk and Red Hulk costumes - 222222
Thor; Chain Armor and Loki-Thor's costumes - 444444
Wolverine; Brown and Feral costumes - 333333
A.I.M. Agent and Blue Suit A.I.M. Agent costumes - 246246