I Don't Own The Song or Gravity Falls

One-Shot

Demons Apprentice

Mabel was talking with her two friends about her brothers strange acts lately. They were worried for her, she had been stressed ever since her brother started to act more insane. Dipper had been acting off, he would often stay more quiet, but when provoked he's growl, also he's been very rude lately. Robbie pushed him hard, and they had to stop Dipper from kill or hurt the Goth. He turned very feral that day.

"Well, could it be possible that a 'monster' is doing this to him?" Candy asked, Mabel frowned, it was possible. After his day out in the forest he came back acting weird.

"Well, we'll just have to watch him closely!" Grenada said in determination. Mabel nodded as well Candy, time to take notes on her brother. Which this was reversed, she'll have to think like him to get what she needs.

Oh brother brother, tells us what's gotten into you, lately?

We're beginning to think that there is nothing in the world you can't do.

Dipper seemed to be walking with more confidence, he smiled as he walked down the street. Candy and Mabel looked at each other, a little worried. Dipper had been dressing different also. He ditched the blue vest and orange shirt for a long sleeved orange shirt with dark blue jeans and a black jacket.

He was also faster, and getting taller then Mabel. Some thought he was just growing up, but, Mabel knew different.

Your getting stronger, And Faster, And Bigger too!

People keep on asking, 'Is there something wrong with you?'

Your acting weird, and talking weird, and growling at everyone!

Everything lately brings the monster out in you.

He had lately started food fights with Mabel, and staying more time in the forest. Once something set him off, he'd become feral again. He was laughing more, finding people amusing when they did stupid things. Now he wasn't afraid to stand up to Stan or Robbie.

Mabel thought it was weird that he flirt openly with Wendy now. Even with other girls, he seemed more social also. But, that wasn't the weirdest thing, he was now really great at sports and not afraid of things he saw in the journal.

How do you do? What's up with you?

Little Brother, Mr. Hyde.

Why are you staring at the moon, tonight?

Dipper was now growling at another monster that tried to hurt him and Mabel on another one of there adventures. And the strange part was this monster was more scared of him now. Backing away with it's ears flat against it's head. Mabel was now beginning to worry about him.

Where did her little brother go?

We don't know what your going through.

We just hope your gonna be alright.

Now tell us, tells us, what should be do?

Now that the monsters out in you!

Mabel frowned as he brother was getting wild at night, he wouldn't return until late midnight for bed. Stan had tried to ask him where he was, Dipper just smiled all-knowingly and said.

'No were important. Just a midnight walk." then he'd walk to his room. Mabel would often talk to Candy on her findings. It was odd, whens he wasn't around he would talk to himself. Mabel knew now it was diffidently something supernatural.

And now were not so sure we like that things are turning out this way.

Mabel would rather have her little brother back.

Then this other brother any-day.

Mabel watched as he brother raced in front of her when they raced down stairs. Not even tripping once as he ran fast. She stopped in surprise, what was up with him? She now was looking through 3 more often to find something that was close to what her brother was. Werewolf seemed the most one, only he didn't howl at night.

Dipper had now be leaving 3 behind with Mabel and going into the forest. That's what got her looking. Dipper never left the journal out in the open. Not after the whole puppet show she did.

Your getting Stronger, And Faster, and Bigger too!

People keep on asking, 'Is there nothing we can do?'

Your acting weird, and talking rude, and growling at everyone.

Everything lately brings the monster out in you!

After a good 3 weeks of this behavior in him. He'd been laughing at nothing. And often talked to himself in front of Mabel. He'd now been more looking to the color orange or yellow in his wear and would sleep with a knife beside him. Dipper had also been more keen as to stay away from Stan or the vending machine down stairs.

Mabel would now spend her time talking to the others, or have them help her find some sort of cure for her brother. Before things got worse.

How do you do? What's up with you?

Little brother, Mr. Hyde.

How come your smiling at the moon tonight?

It was another uneventful night of searching. Mabel finally decided to take a break and have a sleepover. Her brother didn't seem bothered by there laughs and screams. He just stared outside, smirking and chuckling. Then other times he looked scared or worried, then it'd leave.

Mabel wished she knew what was going through him mind. Then it hit her, she quickly got 3, much to her friends disappointment. Dipper silently left the room, as Mabel gulped at what she read, it fit Dipper's personality perfectly. How did she miss this?!

We wish we knew what your going through.

We just hope your going be alright.

Now tell us, tell us, what should we do?

Now that the monster out in you!

"Guys, I know what's wrong with Dipper." Mabel said gravely. They blinked, then read the page.

Signs that someone is becoming a Apprentice to a Demon.

all of them pointed to Dipper. Mabel was now sure it that triangle. She had to help Dipper where was the cure...

More importantly...

Where was Dipper!?

R&R the Song is Monster out in You by Alvin and the Chipmunks. I had to change the lyrics a bit.