YGO: Kingdom Hearts: Harry Potter and the Chamber of Secrets (Animated)
Atem the Kryblade chosen one with his entire group of animal/dragon/pony friends/allies' and Harry's second year at Hogwarts School of Witchcraft and Wizardry, where the Heir of Salazar Slytherin opens the Chamber of Secrets, unleashing a monster that petrifies the school's students.
