Mecha Sonic mk2 by Skarecrow85 on DeviantArt

Heavy Metal Sonic by GBlastMan -- Fur Affinity [dot] net

Mecha Sonic Mark II, Sonic Wiki Zone

Mecha Sonic Inspired Custom Handmade Designer Toy

Custom / Edited - Sonic the Hedgehog Customs - Mecha Sonic Mk II (Battle-Style) - The Spriters Resource

Mecha sonic SRB2 Message Board

Mecha Sonic MK2 by GardePickle on DeviantArt

Game Jolt - Share your creations

Mecha Sonic (Sonic & Knuckles boss) - Sonic Retro

Steam Workshop::Sonic 3 & Knuckles - Mecha Sonic MK2

Mecha Sonic mk II - ibisPaint