Game Gear Sonic 1 and 2 cartridge confusion

Sonic the Hedgehog (Genesis, 1991) - Sega Does

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

The Rarest & Most Valuable Sega Master System Games - RetroGaming with Racketboy

The History of Sonic the Hedgehog: The Genesis Era - LevelSkip

Sonic The Hedgehog Series (Alternate Timeline), Sonic & Sega FanFiction Wiki

Sonic the Hedgehog 1 2 Sega Mega Drive Genesis MD Japan

Sega Master System Architecture

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

Sonic The Hedgehog 2 Sega Game Gear

Assertion: The first “Sonic the Hedgehog 2” released hates Sonic, and hates us all (GIFs)