Sonic the hedgehog 2 remastered sprites by seb2006fnaf on DeviantArt

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

Updated a little, Credit to person who ripped once again

The Ultimate Sonic 1 Sheet

Genesis / 32X / SCD - Sonic Debut (Hack, Demo) - Sonic (SHC21 Version) - The Spriters Resource

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

Mobile - Super Runners Sonic Games (Bootleg) - Sonic the Hedgehog

Custom / Edited - Sonic the Hedgehog Customs - Sonic (Mania, Sonic 1-Style) - The Spriters Resource

Genesis / 32X / SCD - Sonic the Hedgehog 3 (November 3, 1993 Prototype) - Sonic - The Spriters Resource

sonic 3 prototype sprites extended by enzogames29 on DeviantArt

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