• Infinite Superpower
Pause the game, then hold L + R and press Down(2), Right(2), Up(2), Left(2). If you entered the code correctly, you will hear a sound.

• Maximum abilities
Pause the game, then hold L + R and press Right, Down, Right, Down. 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.

• 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.

• 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.

• Completion bonuses
Successfully complete the game to unlock the "Continued Play" option, which allows a new game to be started with all previous stats and items, and an alternate main menu background (with characters from the game).

• Fast health recovery
Upgrade your health recover and the strongest weapon for the character you are currently using. For example, upgrade the Flash's Whirlwind ability or Wonder Woman's Tiara throwing ability with Damage and Duration boosts. All the characters lose health quickly to most any kind of attacks. It is recommended to have a fast recovery of health. Use the Speed Boosts in all the recovery slots.

• Bonus heroes
The following characters can be unlocked by spending the indicated number of Justice League of America Shields that can be collected throughout the game:

Aquaman: 27 Shields
Green Arrow: 76 Shields
Green Lantern (Hal Jordan): 84 Shields
Green Lantern (Kyle Rayner): 55 Shields
Hawkgirl: 70 Shields
Huntress: 53 Shields

• Alternate costumes
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