Dipper Pines and the demon's nightmare

Harry Potter - J. K. Rowling Gravity Falls
Gen
G
Dipper Pines and the demon's nightmare
Characters
Harry Potter, Minerva McGonagall, Albus Dumbledore, Dipper Pines, Mabel Pines
Summary
Dipper is going to hogwarts while dementor flying around the place. Nightmare become more worse.WIP

Chapters