Knuckles' Chaotix (カオティクス Kaotikusu?, lit. "Chaotix") is a 1995 release for the Sega 32X. It is the only Sonic-related game released for Sega 32X. The game features a new combi system, which allows the player to use two characters at once, who are joined together with an elastic ring (also referred to as the ring leash). The game introduces the group later known as the Chaotix to the Sonic series, composed of Vector the Crocodile, Espio the Chameleon and Charmy Bee. It also includes the brief return of Mighty the Armadillo.