RJ sprites by redballbomb on DeviantArt

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

PC / Computer - Sonic Classic 2 - Sonic the Hedgehog (2017) - The

Custom / Edited - Sonic the Hedgehog Customs - Sonic (Sonic 1 SMS

Sonic Advance 3 Sprite Sheets - Game Boy Advance - Sonic Galaxy.net

The Spriters Resource - Full Sheet View - Sonic the Hedgehog Customs - Sonic (Sonic 1 Beta-Style)

Dorkly Sonic Spritesheet Version 1 by Superdave938 on DeviantArt

Custom / Edited - Sonic the Hedgehog Customs - Super Sonic (Sonic 2-Style) - The Spriters Resource

The VG Resource - RatherNoiceSprites' Custom/Edited Sprites

PC / Computer - The Murder of Sonic the Hedgehog - Character Sprites (Other) - The Spriters Resource

Custom / Edited - Sonic the Hedgehog Customs - Sonic (Master System / Game Gear-Style, Expanded) - The Spriters Resource