This page contains Sonic Mega Collection Codes for Gamecube called "Debug Mode (Knuckles in Sonic the Hedgehog 2)" and has been posted or updated on Feb 24, 2010 by Spidey72393. Let us know what you think of this Code by thumbs voting.
Debug Mode (Knuckles in Sonic the Hedgehog 2)
In the Level Select menu, go down to Sound Test and play the tunes in this order: 1,9,9,4,1,0,1,8. You'll hear a chime like when you get a ring to know you did it right.
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