Turbo Mecha Sonic

Turbo Mecha Sonic (also known as Mecha Sonic and informally known as Neo Metal Sonic) is a robot created by Dr. Eggman for the sole purpose of destroying Sonic the Hedgehog however, he rebels against him and begins searching for the Chaos Emeralds. He was the greatest antagonist from SMBZ and its reboot.

History
Neo Metal Sonic was one of three robotic duplicates of Sonic the Hedgehog created by Dr. Eggman to defeat him. Metal Sonic was the one Sonic robot that stood out from the others, designed to match Sonic in all specs including his appearance, strength, and speed. Metal Sonic battled Sonic in a race but was ultimately defeated. However, his "strong will", something the other Sonic robots didn't have, drove him to challenge Sonic faster and stronger than before every time, but was still defeated, even with the Egg Fleet and a monstrous new form at his disposal. The numerous defeats from Sonic and friends would only drive Metal Sonic's desire to defeat Sonic at any cost.

At some point, Metal Sonic managed to sneak into a storage unit where his predecessor models were being held. Metal Sonic then merged himself with his fellow Sonic robots, becoming the entity known as Turbo Mecha Sonic. When Dr. Eggman discovered this, he threatened to shut him down for his rebellion. Mecha Sonic went berserk and destroyed the Death Egg, causing it to crash into Mobius. When he emerged from the ruins, the sight of the destruction he'd caused made him realize just how powerful he'd become, triggering a much more evil and bloodthirsty mindset within his artificial intelligence. He started by killing Tails, Amy Rose, Knuckles, Cream, Cheese, Rouge, Omega, and the majority of the innocent animals of Mobius while in search of the Chaos Emeralds. When he finally defeated Sonic, he took the final Emerald from him and prepared to transform into his ultimate form, but Shadow intervened and warped the Emeralds away to the Mushroom Kingdom with Chaos Control. Using the energy he had absorbed from the Emeralds before he was interrupted, Mecha Sonic teleported after the Emeralds and ended up in the Mushroom World as well. Little did he know that he would be followed anyways.

Relationships

 * Sonic: