His glowing red eyes was one of the things decided upon by the team and would give him a deadly, intimidating look. Things did not just have to be perfect, but just have meaning to their design. One of the keywords for this new rival was 'menacing' and his design flowed from a concept. Kazuyuki Hoshino had a clear idea in his head when he was briefed. Naoto Ohshima wanted to introduce a new rival for Sonic in Sonic the Hedgehog CD. To this day, Metal Sonic remains one of Sonic's most dangerous foes. However, he always fails in the end, only to later return more powerful than before. A cold-hearted, aggressive, and ruthless killer, he is obsessed with proving his superiority to Sonic and eliminating him for good to the point where he has rebelled against Eggman more than once to achieve his goal. While usually serving as Eggman's obedient and silent enforcer, Metal Sonic is an intelligent robot with a very dark side. First deployed during the Little Planet incident, Metal Sonic confronted Sonic in battle and lost, though he would repeatedly return to challenge Sonic and his allies as Eggman's 'too-sharp sword'. The brainchild of Eggman, he is by far his greatest creation and one of his magnum opuses. Modeled with extreme accuracy after Sonic, Metal Sonic not only resembles his template, but can also imitate his moves and achieve speeds matching and even exceeding the hedgehog's own. Eggman for the sole purpose of destroying the hedgehog.

He is an evil, ultra-high performance, very advanced Badnik version of Sonic the Hedgehog that was created as a secret weapon by Dr. Metal Sonic ( メタルソニック, Metaru Sonikku ?) is the secondary antagonist of the Sonic the Hedgehog series. Metal Sonic, Sonic Generations (console/PC) I WILL BATTLE YOU AS MANY TIMES AS IT IS NECESSARY. Sega Streaming Theater Sonic Edition (cameo).Mario & Sonic at the Olympic Games Tokyo 2020.Mario & Sonic at the Rio 2016 Olympic Games (Nintendo 3DS).Mario & Sonic at the Rio 2016 Olympic Games (Wii U).Mario & Sonic at the Sochi 2014 Olympic Winter Games.Mario & Sonic at the London 2012 Olympic Games (Nintendo 3DS).Mario & Sonic at the London 2012 Olympic Games (Wii).Sonic Generations (Nintendo 3DS) (cameo).Sonic the Hedgehog 4: Episode I (cameo).Mario & Sonic at the Olympic Winter Games.

Metal sonic generations model