This page contains Justice League Heroes: The Flash Codes for GameBoy Advance called "Cheat Mode" and has been posted or updated on Nov 4, 2006 by DanboyDan. Let us know what you think of this Code by thumbs voting.
At the title screen enter these codes for cool effect. With each code hold B button down during entering. Flash yells if you do it right.
|Up, down, left, right, right, left, down, up, select||All heroes|
|Up, down, up, up, down, down, up, down, select||All lives|
|Down, down, down, down, left, right, up, down, select||All powers|
|Up, up, down, down, left, right, left, right, select||Badguys are larger|
|Down, down, up, up, right, left, right, left, select||Badguys are smaller|
|Left, up, right, down, left, up, right, down, select||Flash is larger|
|Down, down, down, left, up, up, up, right, select||Flash is smaller|
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