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, Sonic Wiki Zone

List of Sonic the Hedgehog characters - Wikipedia

Titan Metal Sonic (rebuilt model), Sonic Wiki Zone

Mecha Sonic Mk III by EmeraldPyro on DeviantArt

Sonic Underground - Wikipedia

Metal Sonic Mark V, Metal Sonic Wiki

Sonic X-treme - Wikipedia

Metal Sonic Ver.Red, Sonikkuanime Wiki

Metal Sonic (Classic), Villains Wiki

Metal Sonic, Neo Encyclopedia Wiki

Noticed this on the Sonic Origins Wikipedia page. Why is Ian Flynn

Titan Metal Sonic (transformation), Sonic Wiki Zone

Metal Sonic 3.0, Metal Sonic Wiki