All Working The Invincible Iron Man Cheats - GBA

Invincibility
Press [Right], [Up], [Left], [A], [Right], [Select] at the main title screen. A sound will confirm correct code entry.

Level select
Press [Select], [Up], [B], [A], [Right], [Up] at the main title screen. A sound will confirm correct code entry.

Alternately, successfully complete the game to unlock the "Level Select" selection at the options screen.

Unlimited chest plate super blasts
Press [B], [A], [Left], [Down], [Up], [Right] at the main title screen. A sound will confirm correct code entry.

Defeating Blizzard
When you damage Blazzard enough, he will go upwards to a cryogenic regenerator and replenish his energy. When he does this, follow him as fast as possible to the cryogenic regenerator and fire rapid shots at it. It will cause major damage to Blizzard. Repeat these steps two more times and Blizzard will be killed easily.

Defeating Crimson Dynamo
When you begin the battle with Crimson Dynamo, there will be a light blue sphere to the left. Pick it up and press [L] to fire a chest blast at him. He will then be stunned for a few seconds. Next, press [R] to charge close enough to hit him while he is still stunned. This will cause damage to Crimson Dynamo. Repeat these steps until he is defeated. Be aware that the light blue sphere will appear to the left at first, then the right, then the left again.