Knuckles, Knuckles & Knuckles is a fan-made ROM hack for the Sega Genesis, possibly based on the Sonic series. It implies a gameplay experience focused on the character Knuckles, likely presenting a modified version of a Sonic game.  Details regarding its development team and exact gameplay mechanics require further investigation into ROM hacking communities.

Knuckles, Knuckles & Knuckles

Knuckles and Knuckles 2 V1