Sonic the Hedgehog (8-bit), Sega Wiki

Sonic the Hedgehog is a 2D platform game in the Sonic the Hedgehog series developed by Sonic Team in conjunction with Ancient. The game was then published by Sega. The game was made for the Master System and Game Gear. The game was re-released as part of Sonic Mega Collection Plus and was included as a hidden mini-game in Sonic Adventure DX. Both of them are the Game Gear version. Sonic the Hedgehog battles Doctor Robotnik (Dr. Eggman in the Japanese version) for six Chaos Emeralds. When collect

Sonic the Hedgehog — StrategyWiki Strategy guide and game reference wiki

Miles Tails Prower - SmashWiki, the Super Smash Bros. wiki

Dr. Eggman - Super Mario Wiki, the Mario encyclopedia

Adventures of Sonic the Hedgehog (partially lost unaired pilot of DIC animated series; 1992) - The Lost Media Wiki

Sonic the Hedgehog (8-bit video game) - Wikipedia

History of video games/Platforms/Sega Genesis - Wikibooks, open books for an open world

Sonic the Hedgehog - SmashWiki, the Super Smash Bros. wiki

Sonic the Hedgehog (lost Tokyo Toy Show prototype build of Sega Genesis/Mega Drive platformer; 1990) - The Lost Media Wiki

Five bugs in Sonic the Hedgehog for the Sega Genesis [Official Sonic Retro Wiki video]

Sonic the Hedgehog 2 (8-bit), Sonic Wiki Zone

Sonic the Hedgehog (8-bit), Sega Wiki

Sonic the Hedgehog (16-bit), Sonic the Comic Wiki