Metal Scourge

Metal Scourge is a robotic duplicate of Scourge the Hedgehog, much like Metal Sonic is to Sonic the Hedgehog. His first mission was to assist Metal Sonic in defeating Sonic and Scourge the Hedgehog and for a time victory seemed within the grasp of their metal claws, but they were destroyed when the Suppression Squad were called in by Scourge to assist in the battle.

Assisting Metal Sonic
Metal Scourge's first mission was when he was sent to Freedom HQ to help the newest model of Metal Sonic to defeat Sonic and Scourge. The two then engaged in a mighty fight aginst their organic counterparts and it seemed they would wear them out until Sonic got an idea. (StH: #191, #192)

Destruction
His idea came from his recent battle with the Egg Beater and how it could match him blow-for-blow, but couldn't handle other opponents as well. So Scourge, regretfully, called in the said of the Suppression Squad and their combined forces allowed them to destroy the two metals. (StH: #175, #176, #177, #192)

Abilities
Metal Scourge shares many of the abilities Metal Sonic has, including speed, strength, flight, agility and moderately strong armor. In addition to this, he wields claws with serrated edges on top like saw teeth and has twin air ducts for his engine on the front side meant to imitate the scars that Locke put on the real Scourge's chest. Aside from this, there are no discernible functional features of Metal Scourge that indicate it operates differently or is superior or otherwise to Metal Sonic. Given that Dr. Eggman said the design of Metal Scourge was on the fly, it's possible he took an already assembled Metal Sonic body and simply made some cosmetic changes to it. (StH: #191, #192)

Background information
Like Metal Sonic, Metal Scourge sports a paint scheme that helps emulate his biological template. It is interesting to note that Metal Scourges eyes, in reference to the color swaps portrayed in Scourge, are opposite to Metal Sonic by being red (due to the shades it seems to wear) with black irises as opposed to black eyes with red irises.