Every one thousand years, one hundred mamodo(demon) descend to Earth to battle each other for the right to become king of the mamodo world. There's only one problem--the mamodo need human partners in order to use their powerful spell books. If a mamodo's spell book is destroyed, he or she loses the battle and returns to the mamodo world.Kiyo is a brilliant but aloof 14-year-old boy in junior high school. While exploring a rainforest in England, Kiyo's archaeologist father discovers an unconscious Mamodo child named Zatch. He sends the good-hearted Zatch, along with Zatch's mysterious red book, to help his son come out of his shell and make friends. But Zatch has amnesia--he has no idea that he's a powerful mamodo! It's up to Kiyo and Zatch to discover the truth together.The unsuspecting Zatch and Kiyo must defend themselves against the relentless ambushes of mamodo-king wanna-bes. But unbeknownst to the attackers, Zatch and Kiyo have formed a special bond that enables them to unleash Zatch's incredible powers.
I've watched this anime somewhere around 2006, there were little actions in the first few episodes. But as the story progress, it was cool. Even putting the actions aside, it's still fun to watched as it is hilarious. Especially Gash Bell. Please do watched if you're into actions and comedy at the same time, as they can still goofing around while fighting. This anime gave me laughters which made my day a happy day.