Sonic Advance Sprite Sheets - Game Boy Advance - Sonic Galaxy.net

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

Updated a little, Credit to person who ripped once again

Genesis / 32X / SCD - Sonic the Hedgehog - Sonic the Hedgehog - The Spriters Resource

Custom / Edited - Sonic the Hedgehog Customs - Sonic - The Spriters Resource

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

Sonic the hedgehog 2 remastered sprites by seb2006fnaf on DeviantArt

Sonic The Hedgehog Sprite Sheets - Sega Game Gear - Sonic Galaxy.net

The VG Resource - RatherNoiceSprites' Custom/Edited Sprites

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

Genesis / 32X / SCD - Sonic the Hedgehog - HUD Overlay - The Spriters Resource