Mecha Sonic Series by FlameHog419 on DeviantArt

Mecha Sonic Mk. I, Villains Wiki

Movie Mecha Sonic (FanMade) by tailsgene19 on DeviantArt

Not as Daily Sonic Mechs (@Daily_MechaS) / X

Mecha Sonic Mk. I, Metal Sonic Wiki

Mecha Sonic MK.I / Silver Sonic [Sonic 3 A.I.R.] [Mods]

Sonic - Mecha Sonic MKI 06 by theEyZmaster on DeviantArt

Mecha Sonic MK.1 Icons And Alternate Palette [Sonic 3 A.I.R.] [Mods]

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

Sonic The Hedgehog 2 Sprite Sheets - Sega Genesis - Sonic Galaxy.net

Little theory about the Sonic robots (keep in mind this is based how I view events as it's pretty clear all the Sonic robots are part of the same line of robots