Happy Green Hill Zone by IrisOfTheRepliforce on Newgrounds

Sprites and Hoaxes – Shauniversal Studios

ArtStation - A Enhanced Version of Green Hill Zone

Sega Genesis / 32X - Sonic the Hedgehog - Green Hill Zone & Ending - The Spriters Resource

Green Hills Zone Sprites by Alex13Art on DeviantArt

MlKE on X: My own Green Hill Zone Mock up (I know its overdone shhh) #pixelart #sonic #fanart #art #aseprite #gamedev This took a surprising amount of hours. / X

Sonic The Hedgeblog — Past Green Hill 'Tails & The Music Maker' SEGA

Sonic The Hedgehog Sprite Sheets: Game Boy Advance - Sonic Galaxy.net

Imgur: The magic of the Internet

Sonic Platformer Game

Sonic Hacking Contest :: The SHC2021 Contest :: Sonic Vintage :: By ZachmanAwesomeness