What is the name of the Sonic spin-off game released for the Sega 32X?

The Sonic spin-off released for the Sega 32X was Knuckles' Chaotix. Released in 1995, it starred Knuckles the Echidna alongside Vector, Espio, Charmy, and Mighty rather than focusing on Sonic as the sole hero.

The game's defining mechanic connected the player character to a partner with an elastic tether. This “rubber-band” system allowed the characters to swing, pull, and maneuver through stages, creating a style unlike the direct momentum-based movement of earlier Sonic games. The game also included special stages with polygonal 3D effects.

Knuckles' Chaotix began life as a Genesis prototype called Sonic Crackers, which featured Sonic and Tails connected by a similar tether. Sega later moved the project to the more powerful 32X. Sonic and Tails were replaced, and the game was reshaped around Knuckles and a new group of characters.

The title was originally considered for the Sega Saturn, but Sega moved it to the 32X when it became clear that the Saturn version would not be ready. It launched in North America and Japan in April 1995 and in Europe in June, but the commercial failure of the 32X kept it relatively obscure.