|This location exists primarily or exclusively within the Pre-Super Genesis Wave continuity.|
Information in this article may not be canonical to the storyline of the games or any other Sonic continuity.
Inhabited by Mobosaurs, primitive Mobians, and Overlanders, its most notable inhabitants are Ivo Robughnik and the Prehistoric Freedom Fighters (including Sonugh the Boghog and Prehistoric Sally). It was briefly visited by Sonic the Hedgehog after he was caught in a trap by Dr. Robotnik, and his help got the Freedom Fighters moving along the path to independence in their dangerous world. (StH: #12)