Nintendo DS :: Nervous Brickdown Cheat Codes
Sound testEarn a medal on all levels in a world to unlock a sound test option for that particular world. This can be done for all ten worlds. The requirements to earn a medal for all normal stages appear before game play begins in each world. To earn a Boss medal, you must defeat it without losing a life. After earning a medal, the music can be heard by going into the "Bonus" menu.
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