The following are known Action Replay Codes for Fantastic 4: Flame On on Nintendo Game Boy Advance (GBA).
These codes were also known as GameShark Codes and in most cases will work on both devices.
These codes are for the U.S. version of the game.
Master Code – Must Be On
0b7fd036
3333923f...
Agent 9 Infinite Ammo
At the "press start" screen press: Right, Left, Up, Down, Right, Down, Up, Right, B.
Agent 9 Invulnerability
At the "press start" screen press: Left, Down, Up, Right, Left, Up, Up, Left, B. Note: You can still be killed by thorns.
Agent 9 Unlimited Shield
At the...
Easter Egg
In the first level after you go outside of the building, and defeat the first test bots. Fly on top of the building and walk to the left to see half of the cast as game characters. To see the other half, just walk to the other building and fly on top then walk to the left.