Justice League Heroes - Platform: XBox

CheatMode:
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Pause the game, then hold L + R and press 
Down, Left, Up, Right to unlock all bonuses. If you entered 
the code correctly, you will hear a sound.

20 shields
Pause the game, then hold L + R and press Up(2), Down(2). 
If you entered the code correctly, you will hear a sound.

35 random boosts
Pause the game, then hold L + R and press Left, Right, Left, Right. 
If you entered the code correctly, you will hear a sound.

All costumes
Pause the game, then hold L + R and press Down, Left, Up, Right 
to unlock all costumes. If you entered the code correctly, you will 
hear a sound.

Alternate costumes:
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The following costumes can be unlocked by spending the indicated 
number of Justice League of America Shields that can be collected throughout 
the game:

Batman (classic blue)                   : 59 Shields
Batman (Batman Beyond infiltration suit): 74 Shields
Flash (Jay Garrick)                     : 21 Shields
Flash (Walter West)                     : 48 Shields
Green Lantern (retro)                   : 23 Shields
Green Lantern (bold)                    : 30 Shields
Martian Manhunter (modern)              : 29 Shields
Martian Manhunter (true)                : 15 Shields
Superman (black recovery suit)          : 32 Shields
Superman (Earth 2)                      : 65 Shields
Superman (Kandor)                       : 91 Shields
Wonder Woman (biker)                    : 61 Shields
Wonder Woman (toga)                     : 44 Shields
Zatanna (classic blue)                  : 25 Shields
Zatanna (Identity Crisis)               : 38 Shields