The VG Resource - The Ultimate Sonic 1 Sheet

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

Sonic 1 (Tails Sprites) (Edited) by SonicManiaClan123 on DeviantArt

Mobile - Sonic the Hedgehog Part 1 & 2 - Sonic (240x320) - The Spriters Resource

The Textures Resource - Full Texture View - Sonic the Hedgehog 2 - Cartridge & Box (EU)

The VG Resource - The Ultimate Sonic 1 Sheet

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

The VG Resource Spritesheet by DevyOfficial on DeviantArt

The VG Resource - Dolphman's submissions

The VG Resource - The Ultimate Sonic 1 Sheet

PC / Computer - Sonic Classic - Sonic The Hedgehog - The Spriters Resource

The VG Resource - Dolphman's sprite library of customs & edits