Danny Phantom X Gravity Falls
A Tedious Friendship With A Dream Dorito, a Danny Phantom + Gravity Falls Crossover fanfic | FanFiction
"Hey kid!" an unfortunately familiar voice called behind him excitedly, and Danny let his forehead press against the old spines of the books in the Ghost Writer's library. He really didn't want to, but he knew if he didn't Bill would probably make something loud happen, and then they'd both get yelled at.
Rating: K+