Mecha Sonic MKI and MKII, Metal Sonic Wiki

Mecha Sonic was to have a number of models appearing in Sonic X-Treme, which were never finalized. These two models were refered to as Mark I and Mark II

Sonic Superstars Digital Deluxe To Include Prototype Rabbit Skin

Mecha sonic SRB2 Message Board

Super Mecha Sonic Mark II, Sonic Wiki Zone

Mecha Sonic, Funkipedia Mods Wiki

Metal Sonic, Villains Wiki

Sonic X - Wikipedia

Discuss Everything About Sonic Wiki Zone

Sonic the Hedgehog 2 (Video Game) - TV Tropes

Mecha Sonic Series by FlameHog419 on DeviantArt