sonic 2 C.A22 Sonic sprites : r/SonicTheHedgehog

Colors Live - Generations of Sonic Sprites by SuperSonic Fan

Custom / Edited - Sonic the Hedgehog Customs - Sonic (Sonic 1 Beta-Style) - The Spriters Resource

Classic Super Sonic Sprites deviantART: More Like Classic Sonic

Sonic The Hedgehog - No chance to win against this one.

ArtStation - Sonic The Hedgehog sprite animations

Master System - Sonic's Edusoft (Prototype) - Sonic - The Spriters

Accurate Sonic 1/CD Sprites, Sonic 3 AIR Mods Wiki

WIP) Mecha Sonic Sprites, But With Gray by BluerSonic on DeviantArt

Steam Community :: :: Toei Sonic Sprites

Custom Sonic Sprites! by Blurzapper on Newgrounds