Orochi sonic sprites by ralord on DeviantArt

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

Custom / Edited - Sonic the Hedgehog Customs - Sonic (Knuckles

Modern Sonic Sprite Sheet by RedactedAccount on DeviantArt

Custom / Edited - Sonic the Hedgehog Media Customs - Sonic (SatAM) - The Spriters Resource

Game Gear - Sonic Blast - Sonic - The Spriters Resource

The Spriters Resource - Full Sheet View - Sonic Pocket Adventure - Sonic

The VG Resource - RatherNoiceSprites' Custom/Edited Sprites

Custom / Edited - Sonic the Hedgehog Customs - Sage (Sonic 3-Style) - The Spriters Resource

The Spriters Resource - Full Sheet View - Donkey Kong Country 3: Dixie Kong's Double Trouble - Flying Fiends

Genesis / 32X / SCD - Sonic the Hedgehog 3 (November 3, 1993 Prototype) - Sonic - The Spriters Resource