Knuckles and Knuckles 2 V1 is a fan-made ROM hack for the Sega Genesis, likely built upon the foundation of the Sonic the Hedgehog series. Precise details about its creators, gameplay changes compared to the originals, or release date are unavailable without further research into the ROM hacking community where it may have originated.  It's important to note that fan-made ROM hacks are unlicensed and not officially supported by Sega.

Knuckles and Knuckles 2 V1

Kishi Densetsu (Japan)