ArtStation - MECHA SONIC - Fan-art

ArtStation - Mecha Sonic Model (Rendered in Substance Painter and Unity. Also including Wireframe in 3DS Max)

ArtStation - Scrapnik Guardian

ArtStation - Scrapnik Mecha Sonic

ArtStation - Mecha Sonic (Sonic 3)

ArtStation - Metal Sonic Faux Comic Cover

Knuckles V.S. Mecha Sonic by MechaSonicSuperFan on DeviantArt

ArtStation - Sonic & Knuckles: Mecha Madness Fanart

ArtStation - THE GREAT EGGMAN ROBOT - Sonic & Knuckles

ArtStation - Hyper Metal Sonic

ArtStation - Metal Sonic (concept)

ArtStation - Sonic & Knuckles: Mecha Madness Fanart

ArtStation - Mecha Sonic

ArtStation - Metal Sonic Fanart