The Planet Romanus is styled like Ancient Rome on earth. The planet appears to be mostly desert, although this is disputable with how little of the planet was seen.
For an unspecified amount of time, Emperor Zero hosted gladiatorial death matches using innocent slaves in his own city on Planet Romanus, which had an energy dome that kept the local law enforcement out. Arriving on Planet Romanus. Amy Rose and Tekno the Canary were captured by Emperor Zero's men and pitted against each other in the arena. After Tekno faked Amy's death, Amy was able to steak into the city's control room and shut down it force-field, allowing the planet's law enforcers to arrest Zero and return the slaves back to society. Amy and Tekno then left the planet to continue their journey.