Sonic X is the only Sonic the Hedgehog cartoon that isn't actually a cartoon. The anime features three seasons: the first one is about the Chaos Emeralds hunting and generic fighting with Dr. Eggman, and the second is based off Adventure Series and Sonic Battle. The third season, which wasn't made under SEGA control, is all about space travelling, visiting other planets and searching for the Chaos Emeralds which were lost again during the Super Sonic's fight with some mysterious metallic monster.
The thing that is special about this anime is that there are people. The one of the main characters there is Chris Thorndyke, a boy who made friends with Sonic and others in the beginning of first season and was sharing all the adventures with them till the end of the third season.
What did you like in this anime? What disappointed you? Is it good or bad they didn't make the fourth season? What do you think? Share your opinion here.