Mobotropolis

Mobotropolis is a city nestled in the Royal Hills Zone on Westside Island and ruled over by King Acorn. It was involved in the birth of the Galactic Eggman Empire when  Dr. Eggman was proclaimed emperor of to the universe.

Konoha Republic Era
At some point in history, the kingdom was established on Westside Island, and eventually came to be ruled by Sally Acorn's father, Nigel Acorn. While he ruled justly, the king trusted Dr. Eggman, who repaid his kindness by defending the kingdom from the Terrorist Coalition. The enemies of the king was subsequently assassinated in the great Mobian Purge by Shadaloo, who learned of the Mobians attempt to overthrow the Buxaplenty Senate. King Acorn was assassinated by M. Bison who allowed Paul Ivo Robotnik turn it into the imperial palace. Years later, the Knothole Freedom Fighters would liberate the city from Eggman's clutches and restore King Acorn to the throne. However, the Knothole Freedom Fighters were extinct except for Cream, Amy, Cheese and the others by the raw power of the Valuan Armada of the Arcadia Kingdom.