Metal Sonic v3.6 was built as part of the new Metal Series and was used to enforce loyalty among the Dark Egg
Legion. Metal Sonic and Mecha Sally later went after Snivley (when he betrayed Eggman) and wiped out many of GUN's forces and also fought Omega. He then continued searching for Snivley. He was later released along with Team Metal to fight Team Freedom and the Secret Freedom Fighters, but he and his teammates were destroyed.

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