Cheat menu:
Pause the game and highlight the "BGM Volume" option. Hold L + Z + B + X + C + R (in that order). A cheat menu will appear when all the indicated buttons are held. The cheat options allow levels, ammunition, power, and lives to be adjusted. Highlight a cheat option and rapidly press C to increase its value. After the cheat menu is enabled, it may be redisplayed at any time by pressing L while the game is paused.