Zatch Bell!

Kiyo is immersing himself in his father's archaeology texts and is closing in on the location of Milordo-Z's whereabouts. Megumi and Tia also help, but Megumi is feeling the pressure of her busy life as a high school student and pop star. When Ponygon goes out to find the owner of his spell book, a dog runs by and steals his book! (Source: IMDb)