"S3 Knuckles the Echidna (NTSC Version) - Sonic the Hedgehog 3 & Knuckles" is a high quality rip of the NTSC version of "Knuckles the Echidna" from Sonic the Hedgehog 3.
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The advertised track is mashed up with "Santa's Lap" from jacksfilms' "ROYALTY FREE CHRISTMAS SONGS #4" with it bitcrushed to better fit the advertised track. The sound effect present in "Santa's Lap" is also replaced with a similar sound effect from Sonic the Hedgehog 3 & Knuckles.