Sonic X

Sonic X (ソニックX Sonikku Ekkusu?) is an anime series loosely based on the Sonic the Hedgehog video game 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 2003 by TV Tokyo. During that same year, 4Kids Entertainment obtained the license to localize and broadcast the show in America.

Originally planned as a 52 episode series which would be inspired by the story-lines of the Sonic Adventure series, Sonic X expanded to 78 episodes between 2005 and 2006. These additional episodes (53 to 78) were never aired in Japan. An interesting note is that the original Japanese version is probably one of the more controversial anime to come across 4Kids' line of dubbing, and thus it was heavily edited though all 78 episodes that were dubbed in English.