Metal Sonic v3.3 was built by Eggman to kill Sonic, this model was equipped with an SXSU-401, allowing it to travel between dimensions. Metal Sonic fought in the Hedgehog brawl against many other Hedgehogs before being stopped by Silver. Metal Sonic then helped Sonic to defeat Scourge before being transported to the Sonic X verse by Shadow and working for that Zones Eggman to defeat Sonic. He was then transported again by Shadow to the Sol Dimension. Metal Sonic fought Shadow and defeated him, he then attacked the main island before battling Shadow, Blaze and Marine, he was suprise attacked by the after Shadow asked Metal Sonic to join the heroes (to which he declined) and heavily damaged.