When a teenager named Lori finds a strange orphan girl named Kolulu, (Koruru in the original and in the Manga dub) she decides to have her as a sister and care for her. They like each other, and quickly looks like real sisters. Meanwhile, Zatch goes to the park while Kiyo is on school, and finds her playing with a doll that reminds Volcan 300. Jealous for the quality of the doll and the attention that she gets from Lori, Zatch wants to have the same from Kiyo. After a few days, Lori discovers in Kolulu's backpack a strange book; but what she didn't expected, was that it would give her strange powers only by saying Zeruku. After Kolulu's transformation, she starts attacking people in the town. After a few time, she's forced to use the spell again, leading to a fight against they with Zatch and Kiyo. When Zatch discovers that the Mamodo is Kolulu and that she doesn't want to fight, he stop his attacks. Kolulu learns her second spell, Zerusen. In the end, Zatch is forced to burn her book, leading to sadness to Lori who will be alone again. Then he promises to Kolulu that he'll be a kind king, to stop the Mamodo battles. (Source: Zatch Bell Wiki)

Aired on: 5/24/2003