Mecha Sonic (Sonic & Knuckles boss) - Sonic Retro

Evolution of Mecha Sonic in Sonic Games (1992-2023)

Mecha Sonic, Ultimate Pop Culture Wiki

Death Egg Robot (Sonic the Hedgehog 2), Sonic Wiki Zone

Sonic Hacking Contest :: The SHC2022 Contest :: Sonic the Hedgehog Vintage - 2022 Demonstration :: By ZachmanAwesomeness

Mecha Sonic in Sonic the Hedgehog - Sonic Retro

Version 1.23 Released! Metal Series Boss Rush! - Sonic 3D in 2D by Sotaknuck

Sonic & Knuckles - Wikipedia

Sega Genesis / 32X - Sonic the Hedgehog 2 - Mecha Sonic - The Spriters Resource

Chaotix final boss - Sonic Retro