The VG Resource - The Ultimate Sonic 1 Sheet

Demo - Sonic of the Ring - Tutorials Room v0.5 Demo

Sonic 1 Ultimate Sheet by TheGoku7729 on DeviantArt

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

The VG Resource - Doing Sonic 1-sized, Sonic 1-visual-styled sheets for other characters than Sonic

Genesis / 32X / SCD - Sonic the Hedgehog - Objects (Common) - The Spriters Resource

Mighty and Tiara custom Sonic sprites

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

Sega Genesis / 32X - Sonic the Hedgehog - Title Screen, Stage Select & Company Screens - The Spriters Resource

The Textures Resource - Full Texture View - Sonic the Hedgehog - Cartridge & Box (US)