Goosebumps: The Girl Who Cried Monster (1995)

Sinopsis

Lucy loves telling monster stories, but her family and friends are tired of her wild tales. So, when Lucy sees a real monster—Mr. Mortman, the local librarian—no one will believe her. If she can just get proof that he is a monster, maybe then they'll listen. But is it too late? Mom and dad have invited Mr. Mortman to dinner! This is sure to be one meal that'll be hard to swallow.