Sonic the Hedgehog: Official Game Guide, Sonic Wiki Zone

Sonic the Hedgehog: Official Game Guide is a strategy guide book published by Prima Games in the United States for Sonic the Hedgehog (2006).

Green Hill Zone (Sonic the Hedgehog), Sonic Wiki Zone

Sonic Advance 2 - Wikipedia

Sonic Advance — StrategyWiki Strategy guide and game reference wiki

Sonic Superstars: Egg Fortress Boss Fight Guide, Wiki, Gameplay and More - News

Sonic Adventure - Wikipedia

Sonic the Hedgehog (8-bit) — StrategyWiki

Sonic the Hedgehog: The Official Movie Novelization, Sonic Wiki Zone

Sonic (SSBU) - SmashWiki, the Super Smash Bros. wiki

Sonic After the Sequel - Wikipedia

Zone: 0 > Sonic 1 > Green Hill Zone

Sonic Adventure 2: Battle Strongest Strategy Guide

Sonic the Hedgehog 3 Official Guide Book, Sonic Wiki Zone