Sonic X, Sonic Wiki Zone

Sonic X (ソニックＸ, Sonikku Ekkusu?) is an anime series loosely based on the Sonic the Hedgehog series. It was animated and produced in Japan by TMS Entertainment with the partnership of Sega and Sonic Team. It was first broadcasted in Japan in April 2003 by TV Tokyo. During that same year, 4Kids Entertainment obtained the license to localize and broadcast the show in the United States. Originally planned as a 52 episode series which would be inspired by the storylines of the Sonic Adventure series

Sonic X Collection 01, Sonic Wiki Zone

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

Death Egg Zone - Sonic Wiki - Neoseeker

Bubble Bomb (Sonic X), Sonic Wiki Zone

Green Hill (Sonic X), Sonic Wiki Zone

Super Sonic (Sonic X), Sonic Wiki Zone

Sonic the Hedgehog (Sonic X), Sonic Wiki Zone

Knuckles the Echidna (Sonic X), Sonic Wiki Zone

Archie Sonic X Issue 25, Sonic Wiki Zone

Sonic X Volume 16 (Australia), Sonic Wiki Zone