Metal Sonic

While the original Metal Sonic was built by Dr. Robotnik, Dr. Eggman has built his own. Unlike the first Metal Sonic, Eggman's is a silent, cold, emotionless robot, perhaps making it deadlier than any other mechanical Sonic copy...

First Meeting
When the Freedom Fighters and Shadow the Hedgehog found a lost military base from before the Days of Fury, Dr. Eggman built a new Metal Sonic and sent him to the base. Metal Sonic, Sonic, and Shadow all got into a three-way brawl that went throughout the base. When the three were separated, however, Metal Sonic conversed with the base's guard, Issac, about how the Chaos Emeralds were created. When the three started fighting again, however, they stumbled upon an ancient missile that was about to launch. But the missile was stopped and the new Metal Sonic was defeated. He was last seen being carried off by Mecha. (StH: #146, #147, #148, #149)

Later Appearences
Another Metal Sonic (most likely the same one from issues 146-149) soon captured Sonic and brought him to Dr. Eggman, who used a device to control Sonic's body. When Metal Sonic went into some sort of stasis, Snively attempted to put him under his control. However, this failed, demonstrating that EVERYTHING in New Megaopolis is watching Snively. When Sonic was freed from Eggman's control, he and Metal Sonic attacked Castle Acorn, but Metal Sonic was easily destroyed by Sonic, Tails, and Knuckles. (Free Comic Book Day Special|FCBS)

Interestingly, another Metal Sonic was seen being built (or rebuilt) when Espio was sneaking through Eggman's base. (StH: #174)