Sonic the Hedgehog 3 & Knuckles (1994)

Sonic the Hedgehog 3 & Knuckles (or simply Sonic 3 & Knuckles or Sonic 3 Complete Edition) is a platform video game which is the result of locking-on Sonic & Knuckles with Sonic the Hedgehog 3 using the former catridge's unique "lock-on" technology. It is essentially a large combined game of its two lock-on components and contains all Zones from the said games and also contains special features unique to this game. This would have been the original Sonic the Hedgehog 3 the developers intended but time constraints by Sega resulted in the game being split into two.

never obsolete - Sonic the Hedgehog 3 & Knuckles (Genesis, 1994)

Sonic 3 & Knuckles, Soundeffects Wiki

Sonic the Hedgehog 3 in development along with Knuckles spin-off

Sonic the Hedgehog 3 - Genesis (1994) : r/nostalgia

Sonic the Hedgehog 3 & Knuckles (1994) – Movie Reviews Simbasible

Corona Jumper: Sonic 3 and Knuckles (Sega Genesis, 1994) (Sonic 3

Sonic and Knuckles (Sega Genesis) - online game

Sonic & Knuckles (Video Game 1994) - IMDb

Sonic the Hedgehog 3 & Knuckles (2011) - MobyGames

Sonic & Knuckles (World) (1994) (Platform) (Sega Genesis