 The plot follows Kiyo Takamine and his "Mamodo" partner Zatch Bell's adventures in a tournament that will decide the ruler of the "Mamodo" world.The series premiered on April 6, 2003 and ended on March 26, 2006 with one hundred and fifty episodes in total.Viz Media later bought the rights to air the series where it aired on Cartoon Network's Toonami block and YTV.