Gradius Galaxies Cheats - GBA

All power-ups
Press [Start] to pause game play, then press [Up]x2, [Down]x2, [L], [R], [L], [R], [B], [A], [Start]. Note: This can only be done a limited number of times until it causes your ship to self-destruct.

Alternately press [Start] to pause game play then press [Down]x2, [Up]x2, [Right], [Left], [Right], [Left], [A], [B], [Start]. This code can be done as many times as needed, but costs one life. Additionally, it does not provide the Speed power-up.

Half speed
Press [Start] to pause game play, then press [Left], [Right], [Up], [Down], [Left]x2, [Right], [Start]. Repeat the code to disable its effect.

Self-destruct
Press [Start] to pause game play, then press [Up]x2, [Down]x2, [Left], [Right], [Left], [Right], [B], [A], [Start].

Delete saved game
Enter the options screen, highlight "Exit", then hold [L] + [R] + [B] and press [Start].

Challenge A mode
Successfully complete the game to unlock the ''Challenge A'' option at the main menu.

Challenge B mode
Successfully complete the game in Challenge A mode.