Sonic: Metallix Unleashed (169361) : BlazingZtar755 : Free Download, Borrow, and Streaming : Internet Archive

A Sonic the Hedgehog fan comic which features Metal Sonic as the primary antagonist. Credit for sprites where it is due. May feel somewhat generic.

Metallix Troopers, Freedom Fighters NEO Wiki

Metal Sonic in Sonic the Hedgehog 2 1.1 : Free Download, Borrow, and Streaming : Internet Archive

Sonic and Eggman (7671) : Darkblade128 : Free Download, Borrow, and Streaming : Internet Archive

Metallix, Smash Fighters Z

Brotherhood of Metallix by RandomoTheRandom2 on DeviantArt

Sonic X: Complete Series Discotek Media Japanese Language Collection BluRay Rips in MP4 format With English Subtitles : SEGA, TMS Entertainment and 4Kids Entertainment : Free Download, Borrow, and Streaming : Internet Archive

Metallix, Videogaming Wiki

Sonic and Eggman (7671) : Darkblade128 : Free Download, Borrow, and Streaming : Internet Archive

DUB] Sonic X Vol. 2: The Chaos Factor : TMS Entertainment; 4Kids Entertainment : Free Download, Borrow, and Streaming : Internet Archive

Sonic X : Free Download, Borrow, and Streaming : Internet Archive