Gradius 3:
Contributed by Richard

Pause the game and push Up, Up, Down, Down, L, R, L, R, 
B, A, start and you will have full options.

30 Lives

On the Title screen, hold Left, hit A thrice, and 
continue your game normally.

Full Options

While playing the game, press Start to pause the game. 
Then hit Up, Up, Down, Down, L, R, L, R, B, A, and 
Start. You can do this once per stage.	

5 Extra Continues

On the Title screen press X as quickly as possible until 
you have nine continues. Then continue the game 
normally. This will not work with the 30 Lives code.