Chaos Emeralds - Sonic Wiki - Neoseeker

Sonic Frontiers - Walkthrough and Guide – SAMURAI GAMERS

Sonic Adventure DX: Director's Cut — StrategyWiki

Sonic Triple Trouble - Sonic Wiki - Neoseeker

Oh No! The Chaos Emeralds! by bandicootbrawl96 on DeviantArt

April 2016 – Page 4 – Robert Kellett – Retrospectives of Gaming History

April 2016 – Page 4 – Robert Kellett – Retrospectives of Gaming History

Sonic Adventure (Game) - Giant Bomb

Sonic The Hedgehog: Emerald Chaos P6 by kabuto-gouki on DeviantArt

Chaos Emerald (Adventures of Sonic the Hedgehog), Sonic Wiki Zone

Chaos Emerald (Sonic the Comic)

archie comics

Walkthrough - Sonic Frontiers Guide - IGN