This page contains Sonic Chaos Codes for Gamegear called "Sound Test" and has been posted or updated on Aug 8, 2007 by reggimaans. Let us know what you think of this Code by thumbs voting.
Go the the title screen and press Down, Down, Up, Up, Left, Right, Left, Right, 1, 2, Start. You should now have a sound test. Note that this code is often confused with the Level Select Code.
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