Knuckles vs Mecha Sonic MK 2 by GardePickle on DeviantArt

Mecha Sonic Inspired Custom Handmade Designer Toy

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

Mecha Sonic in Sonic the Hedgehog - Sonic Retro

IDW's Mecha Sonic MK2 - S&K Style! : r/SonicTheHedgehog

Mecha Sonic from Sonic 2 MD by MauroFonseca on DeviantArt

Sonic the Hedgehog 2 - Mecha Sonic Sfx

Sonic 2 Character Designer Shares Interesting Tidbits About Tails, Super Sonic, Mecha Sonic and More! – Sonic City

Super Mecha Sonic Vs Silver Sonic And Silver Tails

In Sonic 2 (8-bit), Mecha Sonic was designed so that its height matched Sonic's. In Mania, it still has that very same height: 32 pixels. : r/SonicTheHedgehog

Mecha Sonic! - Sonic The Hedgehog Movie