I apologize for the thumbnail. Some data still remains for Knuckles in the Sonic 3 prototype.
Codes to "play" as Knuckles:
FFEF4C:0003
FFFF08:0003
FFFF0A:0003
FFB038:0200 ~ Possibly not needed.
FFFA80:0101 ~ Enables harder bosses.
For more info visit: https://tcrf.net/Proto:Sonic_the_Hedg...
http://info.sonicretro.org/Sonic_the_...
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