When Zatch first heard that his father was the King of the Mamodo World, and that he was the one who made Mamodos who didn't want to fight like Kolulu, Tia, and Ponygon fight anyway, he denied it. Zeno told him that it was true, and Kiyo got Zatch to refocus on his fight with his brother by telling him that it didn't matter what kind of a king his father is, as long as he is a better one.