Note: This game is also titled Konami Arcade Classics, Konami Arcade Classics Hits, and Konami Arcade Collection.
At the game selection screen, select "Gradius", then press Up(2), Down(2), Left, Right, Left, Right, B, A at the title screen. If you entered the code correctly, you will hear a sound. Pause the game to give your ship all power-ups except for speed. Note: This can only be done once.