Metal Sonic (Character) - Giant Bomb

Metal Sonic is a robotic Sonic created by Dr. Robotnik and has appeared in various Sonic games and spin-offs.

Soraverse-Metal Sonic's Ki based abilities by HaoRoku on DeviantArt

Sonic the Hedgehog; The Equestrian Dimension - Fimfiction

What is your biggest sonic theory : r/SonicTheHedgehog

Sonic the Hedgehog (Character) - Giant Bomb

What is your perfect Sonic game idea? : r/SonicTheHedgehog

Giga Metal, Sonic Wiki Zone

Sonic the Hedgehog (Character) - Giant Bomb

Metal Sonic Rebooted [Sonic the Hedgehog 2] [Mods]

Metal Sonic (Character) - Giant Bomb

I-I don't get why most people don't like Sonic's first encounter with Surge, Sonic reacted completely in character knowing what he knew at the time… : r/SonicTheHedgehog

Metal Sonic (Character) - Comic Vine

Knuckles the Echidna - Wikipedia

Metal Sonic (Sonic Boom), Sonic Wiki Zone

Metal Sonic, Mobius Encyclopaedia

Sonic Heroes (Video Game) - TV Tropes