Justice League Heroes cheats and cheat codes for Sony PSP

Activate cheat mode:
Pause the game play by pressing Start, then, hold L + R and press 
Down, Left, Up, Right to activate cheat mode. This code will allow 
the other cheat codes to be enabled, as well as unlock all costumes. 

Invincibile mode:
Pause the game play by pressing Start, then, hold L + R and press 
Left, Down, Right, Up, Left, Down, Right, Up. 

20 shields:
Pause the game play by pressing Start, then, hold L + R and press 
Up, Up, Down, Down. 

35 random boosts:
Pause the game play by pressing Start, then, hold L + R and press 
Left, Right, Left, Right. 

Maximum abilities:
Pause the game play by pressing Start, then, hold L + R and press 
Right, Down, Right, Down. 

Infinite Superpower:
Pause the game play by pressing Start, then, hold L + R and press 
Down, Down, Right, Right, Up, Up, Left, Left. 


Unlock new characters:
During the game play you can collect Justice League of America shields.
You can unlock new characters if you spend the indicated amount of
shields.

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


Alternate costumes:
During the game play you can collect Justice League of America shields.
You can unlock new costumes if you spend the indicated amount of
shields.

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

Unlock the "Continued Play" option:
Finish the game once. This option allows you to play a new game 
with all of your previously earned stats and items.