Ivo Robughnik has similar traits to the modern Robotnik, with his bald head and his trademark orange mustache. Where the caveman differs is his thick orange beard and orange-spotted brown toga. Robughnik also shares a similar personality to Robotnik, as they both sang a similar song when they "defeated" their nemesis.
Being the main enemy of the Prehistoric Freedom Fighters, he terrorized them with primitive (though for him, state-of-the-art), technology such as catapults. He wishes he had minions to order, but since he has none, he orders himself around. When Sonic the Hedgehog visited Prehistoric Mobius, Robughnik shot a bolder at him and Sonugh the Boghog. He thought he had defeated his rival, however Sonic and Sonugh were able to go underground before the bolder crushed them. Sonic's subsequent efforts in helping the Freedom Fighters make the surface of Mobius safer for themselves almost certainly made Robughnik's campaign against them even more difficult.