Prehistoric Rotor and his teammates.
Prehistoric Rotor is the Prehistoric Mobius version/ancestor of Rotor, and member of the Prehistoric Freedom Fighters. He is an enemy of Ivo Robughnik, from whom he and his teammates initially hid underground, which was also their method of escaping predatory Mobosaurs. Sonic the Hedgehog convinced them that there was a better solution: planting hedges that could be used as cover. (StH: #12)