Mobium is a rare metal element found within the Sonic Legacy universe. It was originally discovered by Gerald Robotnik, and was used to create mechanical entities such as Artificial Chaos, albeit undocumented. It was also later rediscovered by Tekno the Canary, and used by Dr. Eggman after stealing Tekno's research on the metal.
Mobium is an incredibly durable metal, and is infused with natural Chaos energy. Primary uses of Mobium include electronic prosthetics for Mobian amputees, which due to their natural affinity to Chaos energy, allows the prosthetics to sync better with the user, as well as enhanced Badniks created by Dr. Eggman, most notably Metal Sonic.
Its unique properties allow anyone to hold it with their bare hands, acting as a non-corrosive or non-damaging element. Thanks to this, this is what makes it extremely versatile for all types of purpose.
- The idea of using Mobium as a stronger, Chaos energy-enhanced metal was inspired by 'Megatal' from Fleetway's Sonic the Comic. Inspiration was also taken by having Tekno the Canary being the lead researcher on the metal, with Dr. Eggman eventually stealing her knowledge for his own use.
- The name for Mobium is inspired by the Adventures of Sonic the Hedgehog animated series, where the term was used for Mobius' currency.