ArtStation - Mecha Sonic (Sonic 3 and Knuckles)

Murder Sonic - The Death Machine of Stardust Speedway

ArtStation - Metal Knuckles

ArtStation - Mecha Sonic

ArtStation - robotnic mech

ArtStation - Sonic 3

painting of doctor ivo robotnik fighting sonic the, Stable Diffusion

ArtStation - Mecha Sonic - Sonic 3 & Knuckles

He is spooky, he is scary, but in his heart he's by K4VE on DeviantArt

ArtStation - Sonic The Hedgehog - Characters #3 - Knuckles

Metal Sonic, robot, sonic the hedgehog, villian, HD phone wallpaper

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

ArtStation - Sonic & CO

Metal Sonic in Sonic Prime Season 2???