After Kiyo goes to school, Zatch volunteers to do the shopping for Kiyo's mother. Ponygon accompanies him, and on the way, he notices that the park has become a mess. One of the playground children notices Zatch and tells him it is his fault. Zatch presumes Naomi has plans to take over the park. Zatch and Ponygon follow Naomi to a department store to find out her plan. They meet Tia, along the way, who joins them. After buying some products, Naomi realizes she has been followed, so she tells one of the employees that Zatch, Tia, and Ponygon are lost children. The three are then chased down by store employees who want to take them to the lost-child centre. They later meet up with Kiyo and Megumi. Zatch heads to the park and confronts Naomi. Using the things she bought, she defeats Zatch. Zatch prepares to go home and finds out Naomi has cleaned the park. Zatch arrives home and everyone is dismayed when Zatch confesses that he forgot to go shopping.
Mentre Zatch va a fare la spesa con Ponygon nota che il parco è un disastro, pensa così che sia stata Naomi e che abbia un piano per impadronirsi del parco.
Después de Kiyo va a la escuela, los voluntarios Zatch a hacer las compras para la madre de Kiyo. Ponygon lo acompaña, y en el camino, se da cuenta de que el parque se ha convertido en un desastre. Uno de los niños parque infantil da cuenta de Zatch y le dice que es su culpa.
のんびりとしたいつもの朝、清麿の母が買い物に出かけようとするのを見たガッシュは、自分が行くとウマゴンに乗って出発した。二人で行くといえば公園だが、何だかいつもと様子が違う。そこにナオミちゃんが現れ、ジュテームベーゼ号に乗って、モモノキデパートへと向かってゆく。さあ、追跡だ！
