Sound test:
Hold A + B + C and press Start at the title screen. The word "Test" will appear to confirm correct code entry. Press Up and Down to change the sounds, A to select a sound, and B to exit sound test mode.

Passwords:

Status	Password
SP Attack Magnum Dash (Act 1)
vs. Voulsine	MONSTERRQYQYQMQQQFAQQK
vs. Airhohle	MONSTERRQYQYQMQQQVAQSA
vs. Ventor	MONSTERRAAQYQMWQIGAQSU
vs. Dycoon	MONSTERRAAQYQMWQPYAQKA
vs D-Biton	MONSTERRAAAWQMWQPYAQKA
SP Attack Magnum Dash (Act 2)
vs. Unknown	MONSTERRAAAWQMWQPYAQKA
vs. Ulvolos	MONSTERRAAWADRDIHZQEF
vs. Allowena	MONSTERRAAAWADRDIUZQRM
vs. Octii	MONSTERRZXAWADRDIUZQRM
vs Ploguraz	MONSTERRZXAJADRDIJXQHI
vs. Hax-004	MONSTERRZXZXADRFDMXQBK
vs. Maclha	MONSTERRZXZXADRFDIZQKX
vs. Ominos	MONSTERRZXZXAJRTWOXQIH
vs. Blenadan	MONSTERRZXZXAJRTWOXQIH
World Finale	BONILLARWIWIWIFYNOXQCD