Game Boy Advance - Sonic the Hedgehog Genesis - Green Hill Zone

Game Boy Advance - Sonic the Hedgehog Genesis - Green Hill Zone - The #1 source for video game sprites on the internet!

Sonic Generations - Wikipedia

Sonic Advance

Game Club #1 — Sonic the Hedgehog (1991) Roundup – Source Gaming

Retro Review: Sonic The Hedgehog 1 (1991, Sega Genesis)

Top 7 2D Sonic the Hedgehog Games

Green Hill Zone Games - Giant Bomb

Classic characters tons of levels awesome power-ups new graphics four-player action via link cables

Sonic Advance

Screenshot of Sonic the Hedgehog (Game Boy Advance, 1991) - MobyGames

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

Sonic Advance, Game Boy Advance

Sonic the Hedgehog Genesis [US] (Game Boy Advance) - (Longplay - Anniversary Mode

Sonic Advance Sprite Sheets - Game Boy Advance - Sonic Galaxy.net

Green Hill Zone - TV Tropes