Kiyo's father shows Kiyo a stone tablet that features a Mamodo creature with demonic writings at the bottom and tells Kiyo to phone him if he finds out what the stone tablet is. Kiyo and Zatch return to Japan and while retrieving his baggage, Zatch finds his horse friend. The horse takes an instant dislike to Kiyo but accompanies them home. Kiyo realizes that the horse is a Mamodo when he finds its book. Angered by the Mamodo's attitude towards him, Kiyo kicks it out of his home. He is then pressured by his friends to find the horse. Kiyo finds the horse trying to find a book owner and Tio explains how lonely it was without a book owner during the Mamodo battles. Kiyo then decides to let the horse stay with him until he can find his book owner. Kiyo then names the horse Mamodo Ponygon.
Il padre di Kiyo gli mostra una tavola di pietra che raffigura un Mamodo e con una scrittura simile a quella del libro. Kiyo e Zatch tornano in Giappone, ma nei bagagli trovano l'amico cavallo di Zatch.
El padre de Kiyo muestra Kiyo una tabla de piedra que cuenta con una criatura Mamodo con los escritos demoníacas en la parte inferior y le dice a Kiyo a llamarlo por teléfono si se entera de lo que la tableta de piedra es. Kiyo y Zatch regresan a Japón y al recuperar su equipaje, Zatch encuentra su amigo caballo .
夏休みもあとわずか。ついにイギリスを後にする日がやってきた。清太郎や見送りに来てくれたセッコロ達に別れを告げ、久しぶりに日本へと帰ってきたガッシュと清麿。荷物受取所で荷物が出てくるのを待っていると……ベルトコンベアに乗せられて来たのは、馬のヌイグルミのような謎の生物だった！
