Metal Sonic Mark III, Metal Sonic Wiki

Metal Sonic Mark III was an upgrade of Metal Sonic which would have appeared in Sonic X-Treme. It changed Metal (or Mecha) Sonic's appearance to be taller and red and also gave him two spear/pile-bunker-like arms. It only has one spine, and also has shoulder & knee pads.

Metal Sonic 3.0, Metal Sonic Wiki

Category:Metal Sonics, Metal Sonic Wiki

Sonic CD - Wikipedia

Metal Sonic 3.0, Sonic Wiki Zone

Metal Sonic Mark V, Metal Sonic Wiki

Sonic Underground - Wikipedia

Custom / Edited - Sonic the Hedgehog Customs - Mecha Sonic Mk II

Sonic Adventure 2 - Wikipedia

Metal Sonic, Sonic Wiki Zone

Metal Sonic, Neo Encyclopedia Wiki

Metal Sonic, Party Ninja Wiki

Metal Sonic Series, Sonic Wiki Zone

Metal Overlord, Metal Sonic Wiki