Sonic X

Back on Sonic's home planet, Eggman has collected all 7 of the Chaos Emeralds, and is about to have absolute power when Sonic interferes, causing an explosion that sends everyone from their world to Earth. Sonic and his friends team up with 12 year old Christopher Thorndyke to collect all the Chaos Emeralds and defeat the evil Dr. Eggman.

(Source: ANN)Note: The series was broadcasted for 52 episodes on TV Tokyo from April 6, 2003 until March 28, 2004. However, the episodes 53-78 were broadcasted together with the rest outside of Japan in the US and France but a decision to broadcast them in Japan was never made, although there exists a Japanese language version for those episodes.

(Source: AniDB)