Metal Sonic

Metal Sonic is a strong, robotic copy of Sonic the Hedgehog created by Dr. Eggman, and the secondary antagonist of the Sonic the Hedgehog series. Metal Sonic, like Eggman, hates Sonic with every fiber of his metallic being, and wants nothing more than to kill his organic counterpart. Hoowever, Metal Sonic's hatred for Sonic has at times dangerously grown beyond even Eggman's, causing him become self-aware, witth ends with bad results. Metal Sonic is shown to be one of Sonic's most dangerous foes, just below Eggman.

Mario and Sonic: Worlds in Danger
Metal Sonic appears as a major villain in Jmkrebs30's Flash series Mario and Sonic Worlds In Danger, alongside Bowser Jr. He is one of the secret soldiers Bowser and Dr. Eggman have. He, along with Basilisx and Mecha Sonic will be unleashed to destroy Mario and Sonic. It's been confirmed that He and Bowser Jr. will fight Mario and Sonic aboard the Death Egg sometime near the end of the series. although metal sonic is weaker than Mecha Sonic it has been shown been shown in the second intro that Metal Sonic can fuse with Mecha Sonic to become Metallix.