Zatch Bell!! (Dubbed) - Season 1

Kiyo Takamine is an average, but isolated, 14-year old genius, until he meets Zatch Bell - a mamodo (demon) sent to Earth to decide the next King of the Mamodo World. Every 1,000 years, mamodo are sent to Earth in search for a human partner that is able to read their spell book. Using their own emotions as an energy source, humans can cast powerful spells from the book to their mamodo - the last one standing becomes the next King!