Gradius Galaxies

					
All Weapons
Pause gameplay and press Up Up Down Down L R L R B A, Start.
Self-destruct
Press Start to pause game play, then press Up2, Down2, 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.
GameShark Codes  

Codes Courtesy of