Metal Mark

Metal Mark is the robotic counterpart to Mark

Classic Metal Mark
He first appears in Mark HD sent out by his creator Chrome to hunt down and kill Mark. He chases Mark in Rocky Mountains and Cosmic Speedway. The theme when he chases Mark is the same as when you are about to drown. Mark destroys him in Dark Depressing Docks.

He later appears in Mark Time as the same manner in Diamond Hill. He appears in the mission "Metal Mark's Return".

Metal Mark 1.0
He appears upgraded in Mark Unleashed. Chrome explains that he found his parts while in the Underworld and rebuilt him and made him "10 times better" (which probably makes the name "Metal Mark 1.0"). He is destroyed permanantly by Shade, which impressed Mark.

His latest appearance is Mark Kart Swan as an unlockable character. It is unknown how he was rebuilt.