Mecha Sonic and Master Emerald - 3D model by HaughtyGrayAlien

ArtStation - Mecha Sonic (Sonic 3 and Knuckles)

HaughtyGrayAlien - Sketchfab

WIP Mecha Sonic Model image - World of an Absolution mod for Platinum Arts Sandbox Free 3D Game Maker - ModDB

Mecha Sonic 3D model print/paint by OnyxCrimsonBlur on DeviantArt

ArtStation - 3d Metal Sonic

ArtStation - Sonic Prop Project #3: Chaos Emeralds/Master Emeralds

Mecha Sonic - Download Free 3D model by Tromak (@htromak) [3f5fa85]

master emerald 3D Models to Print - yeggi

Mecha Sonic, Fictional Fighters Wiki

Genisis 3D models - Sketchfab

Mecha Sonic Model : r/SonicTheHedgehog