The Museum of Mobian Machinery is a museum in the Metropolis Zone that is dedicated to the history of machines through Mobius' past. One exhibit was a steam-powered weapon that was stolen by Grimer to fight the Freedom Fighters and rescue Doctor Robotnik. Said machine was unaffected by the electromagnetic pulse as it was powered by steam. The weapon was quickly defeated by a direct Spin Attack from Sonic the Hedgehog. It is unknown what other devices can be witnessed at the museum, but it could be assumed that there is at least one exhibit from Robotnik's reign considering his love of technology.