While practising the fourth spell, Zatch and Kiyo meet a girl named Djem and her Mamodo partner Yopopo. Djem explains that Yopopo`s dance is able to attract Mamodos and that Yopopo is trying to call the Mamodo Kikuropu and his book owner as they attacked Djem`s family. After she finished explaining, Yopopo is missing and Djem realizes that Yopopo found Kikuropu. Yopopo tries to combat Kikuropu without spells but is defeated. He is saved by Kiyo and Zatch and they team up to combat Kikuropu. Zatch`s "Zaker" proves ineffective and Kiyo tries the use the fourth spell "Bao Zakeruga" but nothing occurs. Yopopo`s book is burnt in the midst of the battle and filled with emotions, Kiyo is able to use "Bao Zakeruga" which summons a giant electrical dragon and defeats Kikuropu. Djem tells Yopopo she loves him and cries as he disappears.