Mount Mobius is a location that appears in the Sonic the Hedgehog comic series and its spin-offs published by Archie Comics. It is an active volcano located near the Hidden City of the Ancients and the most active volatile volcano on Mobius.
The Spin Doctor!
Dr. Robotnik temporarily moved his operations into Mount Mobius, creating the Veg-O-Fortress with three levels: the Toxic Caves, Lava Powerhouse and the Final stage. Sonic the Hedgehog came to put an end to it, despite the Freedom Fighters telling him it is a trap. After navigating the various traps, robots and killer plants, Sonic was lured into a level where he was ejected from the fortress and Mount Mobius via a hidden spring.