Sonic 1-styled sprites - Promotional Movie figures by PacManfan64 on DeviantArt

ArtStation - Sprite accurate Sonic The Hedgehog (16 bits).

Sonic the Hedgehog Game Genie Codes/Cheats, Video Game Hacking#

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

Mobile - Sonic the Hedgehog Part 1 & 2 - Sonic

Sprites and Hoaxes – Shauniversal Studios

Sonic 1 Anniversary Edition - Sonic - Sprite Sheet by LuisToons12345 on DeviantArt

Adventures of Sonic 1, Sonic the Hedgehog Hacks Wiki

Sonic 1 SMS vs Sonic Edusoft

Angie's Sonic sprites/edits (UPDATE for 1.5) [Sonic the Hedgehog Forever] [Mods]

my crappy sprite edit of the sonic sprite from sonic 1 edited to look sorta like modern sonic : r/SonicTheHedgehog