I don't own this photo this belongs to NyaStyle on DeviantArt. He will look the same as above except he would still have some strands of his brown hair and his horns/magic is blue.

When Dipper woke up, his head was killing him almost like he was listening to an entire rock album on full blast. 

"Ugh...What happened?" Dipper said before he immediately shut his mouth and noticed how deep his voice became. Before he started to ask questions however....Bill came in and gave him his breakfast.

"Hello Pinetree! How did you sleep?" Bill asked.

"Cut the crap Bill. I know that you knocked me out last night so what did you do to me?" Dipper said.

"Oh Pinetree...you're so impatient like Sixer. Well if you must know...I changed your appearance and made you a demon." Bill said.

"What?!" Dipper yelled.

"I said that I changed you into a demon. Learn to listen Pinetree." Bill said.

"Oh no...I did not give you permission to change me into a demon. So change me back." Dipper said.

"That's the funny part Pinetree...there is no way to change you back. You're a demon for now and forever. But don't be sad, you're permanently eighteen years old." Bill said.

"Ugh...then can you at least give me a chance to see what I look like?" Dipper Asked before Bill transported a body sized mirror. As Dipper gazed into it...he noticed that a majority of his hair turned white and he had two horns on his head. With the left slightly lower than the right. Dipper almost wanted to scream at these changes especially since he aged 6 years in a matter of an entire night. 

"What do you think Pinetree?" Bill Asked. 

"Sigh...it'll take some getting used to. So...how's Gravity Falls?" Dipper Said casually. He knew that Gravity Falls was already destroyed by Bill, but he figured that the answer would distract him from the changes that he recently went through in one night. 

"Well...it's doing fine. But some of my henchmanics are getting sick and tired of the town so I plan to destroy the barrier." Bill Said making Dipper's heart drop into the pit of his stomach.

"But don't you need to equation to do that?" Dipper Asked.

"Nope. I already knew what it was since....I wanted to mess with Sixer and the Cipher Wheel. But do you want to hear something really interesting...." Bill Said.

"W..What is it?" Dipper Asked.

"If you succeeded in doing the wheel, I would be sent back to the Nightmare Realm where I can rebuild my strength and eventually try again in ruling this misery universe." Bill Said.

"What? But Grunckle Ford said that you would be destroyed." Dipper Said.

"Psst...Like some puny little wheel can actually destroy me. But enough about that...we have to start training Pinetree." Bill Said before he snapped his fingers and transported Dipper to the library to start learning spells. Knowing full well that his Pinetree will slowly become evil as he kept getting more and more powerful.

Which will make the family reunion even more sweet.

Author Notes:

How was the chapter?

Any suggestions?

Bye 👋

PS: I will let you guys decide Dipper's powers, but I will tell you right now that he will not be crossdressing again. It's been done so many times so this time...he will keep wearing the outfit above.