Yopopo (ヨポポ, Yopopo) and Djem (ジェム, Jem) are a team Zatch and Kiyo encounter during their British adventures. Their abilities are the usage of music. After discovering Yopopo, Jem decides to adopt him as a little brother of her own. However, she soon gets sick of him due to his inability to speak Earth language (talking through his own name over and over or singing a pattern) and his desire to take part in the Mamodo fight, which Jem wanted to avoid at all costs. With his bookkeeper avoiding him, Yopopo spent most his time alone, singing and dancing in preparation for battle. At first, Zatch was attracted to Yopopo's dance but Jem attacks Zatch. Then, when Jem was about to say a spell, Kiyo stops her. Jem asked Kiyo and Zatch if they would like to have a picnic with her. She gave Yopopo hi