A/N: Thanks again for the reads! I love you all. Right now, my writing is my only creative outlet(since my spring musical got canceled) and if you guys enjoy it, that adds another level to how it's keeping me happy. Now, on with the chapter!
Dipper snuck away from lunch and went back to his empty cabin. He was sitting in his bed, reading the journal. The more he read, the more his bad feeling grew. He eventually stumbled upon a page about a dream demon named Bill Cipher. The page said things about how he should be avoided at all costs.
He kept looking threw the book when the world around him turned grey. He then saw Bill Cipher himself. Dipper let a scream in his high pitched voice. "Agh, that's a good one," Bill said. "I'm definitely adding that to my hall of screams."
"What do you want?" Dipper asked.
"I just want to strike a deal," Bill said. "I come from a time where you weren't separated from your family at birth. I can make you live in that time. Haven't you always been curious about your birth family?"
"I've been informed that I'm not supposed to trust you," Dipper said. Bill then noticed the journal on Dipper's bed.
"Oh you've been reading that?" Bill asked. "Well I've met the author before. I made a deal with him to teach him the secrets of Gravity Falls, and he took advantage of my powers. I had to banish him to the second dimension to protect yours."
"How do I know that I can trust you?" Dipper asked. He opens a portal and shows him the summer of 2012 from the previous timeline. Dipper smiles as he sees the life he could have had. "Do we have a deal?"
"What do you get out of this deal?" Dipper asked, suspiciously.
"I'll just need to use your physical form one day in the future," Bill stated. "But where you're not going to need it where you're going."
Dipper then let out a sigh. "Ok, just for a short amount of time," Dipper said.
"Perfect," Bill said, with a smirk.
Mabel and "Dipper" arrived at the Mystery Shack. Mabel had gotten Pacifica to cover her, and Dipper faked having a headache so he can have the afternoon off. They went into the mystery shack. "You guys must be Mr. Pines family," an older boy said. "I'm Soos and this is Wendy."
"I'm Mabel, and this is my brother, Dipper," Mabel said. Stanely and another guy then entered the room.
"Hello kids, this is my brother Ford," Stanely said. "This is my great-niece and nephew, Dipper and Mabel."
"Greetings and salutations," Ford stated. "Do kids still say that?"
"Kids never said that," Mabel said. As the others were distracted, Bill in Dipper's body snuck away. He went to the vending machine and put in the secret code Bill had watched Stanely do hundreds of times. He walked downstairs and looked around the lab until he found the interdimensional rift.
He picked it up. He then dropped it and he left his human form. He smirked as he started Weirdmaggedon.