Modified Sonic Sprites

Game Gear - Sonic Labyrinth - Sonic - The Spriters Resource

Master System - Sonic the Hedgehog - Sonic the Hedgehog - The Spriters Resource

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

Sonic The Hedgehog Custom Sprites : Modgen : Free Download, Borrow, and Streaming : Internet Archive

RatherNoiceSprites' Custom/Edited Sprites

The Biggest and Easiest Modding Tutorial [Sonic 3 A.I.R.] [Tutorials]

Modified Sonic Sprites

Custom Sonic Sprites (Original Palette) by MylesDeGreat on DeviantArt

The (probably) Ultimate Guide to Sprite Modding [Sonic 3 A.I.R.] [Tutorials]

Sonic Mania - Sonic 3 Sprites Mod [TAILS UPDATE] [Sonic Mania] [Mods]

Arcade - Waku Waku Sonic Patrol Car - Sonic - The Spriters Resource