Shaman King (シャーマンキング Shāman Kingu) is a Japanese manga series written and illustrated by Hiroyuki Takei. Shaman King follows the adventures of Yoh Asakura as he attempts to hone his shaman skills to become the Shaman King in the Shaman tournament.
Shaman King was serialized in the Japanese manga anthology Weekly Shōnen Jump between 1998 and 2004 and has been collected in thirty-two tankōbon volumes. Since its publication, Shaman King has spawned a substantial media franchise. The manga has been adapted into an animated television series produced by Xebec and co-produced by TV Tokyo. The series has also spawned numerous video games, a trading card game, as well as many types of Shaman King-related merchandise.
Twelve video games based on the Shaman King series have been released to date, the first was Shaman King Tyoh Senji Ryakketu Funbari Hen on December 21, 2001. No games that were developed in Japan have been released outside of that region, however Konami and 4kids Entertainment developed a series of games that were only released in North America and Europe.
Source: Wikipedia, "Shaman King", available under the CC-BY-SA License.