Mobius

Mobius is the name given to the planet that the Sonic series takes place on in most non-Japanese Sonic media. The name Mobius first appeared in the "Sonic Bible" which was written in 1991 as the basis for much of the alternate canon used in North America.

The planet notably made appearances in DiC's three Sonic cartoons as well as both the Archie Sonic comics and Fleetway's Sonic the Comic, featuring as the primary setting in all those pieces of media.