This page contains Sonic Rush Adventure Unlockables for Nintendo DS called "Sound test" and has been posted or updated on Sep 18, 2007 by timmeh. Let us know what you think of this Unlockable by thumbs voting.
For this you have to beat the Titan Boss in Big Swell. Then go to Seagull Beach on Windmill Island. Talk to the koala with the guitar to hear the music, dialogue, and sound effects. Note: This will also open additional missions.
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