35 random boosts
How to unlock: Pause the game, then hold L1 + L2 + R1 + R2 and press Left, Right, Left, Right. If you done this right you will hear a sound.

Fast health recovery
Description: Upgrade the strongest weapon and your health recover for the one you are now using. Such as,upgrade the Flash's Whirlwind ability or Wonder Woman's Tiara throwing ability with Damage and Duration boosts. All the characters lose health fast from most all kinds of attacks so best if you have a fast health recovery. You need to use the Speed Boosts in all the recovery slots.

20 Shields
Description: Pause the game, then hold L1 + L2 + R1 + R2 and press Up(2), Down(2). If you done this right you will hear a sound.

All costumes/outfits
Pause the game, then hold L1 + L2 + R1 + R2 and press Down, Left, Up, Right to unlock all costumes. If you done this right you will hear a sound.

Maximum abilities
Pause the game, then hold L1 + L2 + R1 + R2 and press Right, Down, Right, Down. If you done this right you will hear a sound.

Infinite Superpower
Pause the game, then hold L1 + L2 + R1 + R2 and press Down(2), Right(2), Up(2), Left(2). If you done this right you will hear a sound.

Alternate costumes/outfits
Description: If you spend the listed number of Justice League of America Shields you can unlock the following costumes:

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

Bonus heroes
Description: If you spend the listed number of Justice League of America Shields you can unlock the following characters:

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

Completion Bonuses- Continued Play
How to: You need to win the game if you want to unlock the "Continued Play" option. This will allow a new game to be started with all previous stats and items. There is another MAIN MENU background with characters from the game.

Invincibility
Description: Pause the game, then hold L1 + L2 + R1 + R2 and press Left, Down, Right, Up, Left, Down, Right, Up. If you done this right you will hear a sound.

Cheat Mode
Code: up,up,down,down-gives 20 shields
code:left,right,left,right-gives 25 random boosts
code:left,down,right,up,left,down,right,up-invincibility
code:right,down,right,down-maxes out abilities
code:down(x2),right(x2),up(x2),left(x2)-unlimited energy
code:down,left,up,right-unlock everything

Bonus Heroes
The following characters can be unlocked by spending the indicated amount of Justice League of America shields that can be collected during game play.

Unlockable: How To Unlock:
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

Completion Bonuses
Succcessfully complete the gameto unlock ''Continued Play'' option (to follow a new game to be started with all previous stats and items unlocked'' and an alternate main menu background (with characters from the game).

PS2 Cheats for Justice League Heroes

Justice League Heroes cheat codes

Justice League Heroes cheats