Justice League: Injustice For All (GBA)
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Cheat Passwords
Choose "New Game" from the main menu and enter the following names for the desired effects
Password - Effect
SAMIWAS - Unlock All Missions
SAMIBE - Start with 99 Lives
SAMIAM - Enemies Dont Attack You
Damage immunity
After pausing the game, then highlight the RESUME option and push Select, Start.