Imposter! Chapter 10: Dorky, a gravity falls fanfic

I'll let you guys know which idea gets the most votes at the end of the last chapter of this story. This one isn't the last one, though, so hold your horses!

[Insert reference to the episode "Sock Opera"]

And also, I think Whinkx might be trying to sneak a ladder into my house. He's waiting in my closet... Like the invisible wizard that he is.

Grunkle Stan: "And that's why I own ten guns! Because if somebody ever tries to sneak a ladder in..."

This chapter will be a little longer than the others, because it's almost the end. (Not yet though! I have at least one more chapter after this to write!)

I do not own Gravity Falls.

Nobody Is As Dorky As You

Mabel's P.o.V.

Location: Right outside of the Mystery Shack

"Nice try, Sixer. But not good enough."

The hole in the shapeshifter's arm began to heal itself. Blood vessels stretched out and reconnected as the skin began to grow over the wound. The burn marks disappeared as if they had never been there in the first place.

And then he flashed forward, covering the distance between him and the group in milliseconds. He grabbed Mabel by her already bleeding shoulders and threw her several feet away so that she collided with the trunk of a tree.

Mabel let out a small groan of pain as she slid down the bark onto the grass. Her back and shoulders ached terribly.

The next moments were what Mabel would describe as a living nightmare. The shapeshifter was upon her in seconds, digging his claws into her shoulders even harder then he had before. She tried to throw him off of her, but the spikes he had grown through his skin prevented her from doing much for self-defense.

The rest of the group had taken out weapons, ready to come to her aid. But the shapeshifter had no intent on them intervening. Whenever one was close to hurting him, he'd simply growl, threatening that worse things would happen to Mabel if they interrupted.

So they held back, but their frustration and anxiety was clear on their faces.

The shapeshifter still had his claws embedded in her skin. Mabel shifted beneath his weight, but she couldn't get free.

After what felt like years of struggling and claws digging into her shoulders, the shapeshifter, in one swift movement, turned her onto her side. She shivered, not from cold, but from fear as the shapeshifter reared its head...

And sank his now blade-like teeth into her neck. Pain shot through her as she felt blood drip down her neck. The fact that the shapeshifter was still -apart from the claws, spikes, and fangs- in Dipper's form made it all the more terrifying.

Mabel couldn't take it anymore. Something inside of her snapped. She wasn't going to be beaten by this unearthly creature. She wasn't going to leave Dipper to deal with this whole mess by himself.

With a grunt of effort, she flipped herself onto her back, ignoring the pain that shot down her spine as the shapeshifter's teeth tore out of her skin, and she grasped the shapeshifter by his shoulders.

She didn't care at all when the spikes impaled her palms. She just pushed with all her strength, until the shapeshifter rolled off of her.

She shot up and made a sprint back towards her friends. Now that she was safe -again- they reached for their weapons.

Wendy pulled her axe from her belt. Ford pulled a gun from his holster. Mabel took out her grappling hook. Stan had a pair of brass knuckles, and Soos...

Well, Soos just took out a box of crackers. The shapeshifter's eyes glinted in momentary confusion, but it quickly vanished.

To everyone's surprise, the shapeshifter took a step back. He retracted his claws and spikes, and his fangs vanished. The red tint to his eyes vanished as well.

"Alright," he started, using Dipper's voice again. "I can tell when there's a battle that I cannot win. Even I must admit I can't defeat four peopl-"

"Four? What about me?" Soos asked. The shapeshifter's eyes flashed irritably.

"I'm not counting somebody who just brought crackers. Now, if you'd let me finish, I know I can't defeat all of you..."

His voice deepened, though it still held a trace of Dipper's voice. "You're all in a group... But I wonder... that little piece of crap you call family is alone right now. It would be so easy to just... End him?"

His mouth twisted into an evil smirk. Without waiting for a reply, he vanished in an instant. They could only hear the pounding of his footfalls as he dashed away.

"He's going after Dipper..." Ford mumbled in horror.

Dipper's P.o.V.

Location: The prison

Dipper fidgeted angrily on the cold floor. He was growing restless. There was nothing he could do. Nothing. He couldn't know what was even happening back at the shack. He could only wonder.

It infuriated Dipper. He wasn't the type of person you'd file as "so angry that if you make them mad you have an erupting volcano to deal with". He wasn't like that at all. But now?

He let out an enraged sigh. Then he straightened as he heard panicked voices. It was the guards.

"What the...? But weren't you in your cell? What're you doing out here? Wait... stop moving... Don't come any closer... I'm warning you... Stay ba-"

His words were cut off as they faded into nothing. Dipper could hear the faint sound of gurgling. His throat's been slitted...

He heard more yells as the other two guards met the same fate. Then Dipper heard footsteps. They were slow and heavy, as if they were trying to make Dipper uneasy.

Then a figure came into view. It was him.

No, not me, Dipper told himself. It's the shapeshifter...

The shapeshifter unlocked the cell door with a key he probably stole from on of the guard's corpses and stalked in. He realized that the shapeshifter had something silver in his hands. It was rolled up and it flashed slightly in the dim lighting.

Is that... duct tape?

And then realization dawned on him. The only way he had been able to tell the difference between Wendy and the shapeshifter almost a year ago was because she had given him a sign. But if he couldn't give a sign himself, how would they tell the difference?

The shapeshifter tackled him to the ground. He held Dipper down with one hand on his neck while he held the roll of tape in the other. He tore off a strip of tape using his teeth and set the roll of tape down to grab the strip.

Dipper thrashed wildly as the shapeshifter attempted to tape his mouth shut. Dipper's struggles were useless, though. His cries of help were silenced as his mouth was sealed shut.

The shapeshifter held Dipper against the wall. The creature possessed strength that no human could ever attain, which prevented Dipper from escaping his grip.

Within moments of taping and Dipper's muffled screams, Dipper himself was restrained against the wall. Not because of the shapeshifter, but because he was taped too tightly to the wall. The shapeshifter had succeeded in restricting him to the wall, so that he couldn't move.

The shapeshifter then proceeded to take out both a piece of cardboard and a marker. He scrawled some words into the piece:

HOW ABOUT A GAME? IT'S A LITTLE GAME OF GUESS WHO! CAN YOU EVEN TELL WHO THE REAL ONE IS? I HOPE SO, BECAUSE YOU'LL HAVE TO SHOOT THE ONE YOU THINK IS A FRAUD! TRY TO AVOID THIS? THEN I'LL JUST KILL THE REAL DIPPER MYSELF! CHOOSE WISELY, YOU IDIOTS!

He taped the sign to the wall once he was done writing on it.

The shapeshifter took a step back, admiring his handiwork for a moment, before he walked over to another portion of the wall. Suddenly, he changed form. Long silver strips stretched from out of his arms and wrapped around himself. Then they attached themselves to the wall.

Within moments, he looked exactly like Dipper. He had made himself a perfect copy of Dipper trapped in tape. There was no way to tell them apart, they both looked completely restrained and they both were immobilized.

He knew what was coming next, and he didn't like it. He knew that his friends would have to make the ultimate choice that could very well kill him.

They had to figure out, without signals, who was the real Dipper. He had to find a way to let them know that it was him.

Mabel's P.o.V.

Location: The prison

Mabel stared in horror at three police officers who lay lifeless on the floor with blood flowing from a slit in their necks.

Mabel herself had her own injuries hastily bandaged, but they had all almost immediately went after the shapeshifter. His trail had led them, just as they feared, to the prison.

Oh gosh, Dipper... Please be okay...

She stepped around the bodies, watching as her friends and family did the same. Then they rushed down the hallway of cells until they reached the one Dipper was being kept in.

Without looking st the scene through the bars, she rushed into the cell. It's door had been wide open when she arrived, and now she knew why. The shapeshifter was already there, with Dipper.

There was just one problem.

She didn't know who was who. Both of them were restrained to the wall with quality duct tape, and both had their mouths sealed by the same tape. They both struggled to get free, and they both let out muffled cries for help.

She might've just ran over to them, torn the tape off their mouths, and demand for a sign, but a hand grabbed her before she could.

It was Ford. He didn't say a word, he just pointed to a sign on the wall.

Mabel felt her breath catch in her throat as she glanced from one Dipper to the other. How could she tell them apart?

Her mind was swirling. If they got this wrong, they'd be responsible for shooting Dipper in the head. It would be all their fault.

The others were speechless. There was silence that was only broken by the occasional muffled pleas from the Dippers.

Mabel knew they had to choose. So she looked at the first one's eyes. They seemed so innocent. Their was fear in their gaze, and a certain glimmer to them that seemed desperate for help, that was silently saying "help me"!

Ford, who had his gun in his hands, was aiming at the other Dipper, the one who didn't have that fear in his eyes. She agreed with his decision that the scared one must be the real Dipper.

But then she took a closer look at the other's eyes. They weren't wide open in desperate, silent cry for help. They were just... staring. Not in that creepy kind of way, but they seemed more... real. Like they were trying to tell her something. She realized that they showed slight unease at the situation, but the unsteadiness was masked by the way they sparkled, almost as if he knew that they would make the right choice.

It was in that moment, when Ford was about to pull the trigger on the Dipper with less-fearful eyes, that Mabel realized who was real. She knew she was right, she knew who her brother was, because she had seen the same look on her brother's face multiple times.

Without a word, she pulled the gun from Ford's hands, ignoring the shock on his face, and she trained her aim not on the Dipper whose eyes hid their fear, but instead on the one who's eyes were too begging, too desperate. Too fake.

And she fired. The blue beam crackled in the air as it erupted from the gun. Everyone in the area flinched at the deafening sound that followed. When the smoke cleared, the Dipper with the pleading expression had a gaping hole in his chest that still burned with small embers.

And she knew she was right, because seconds later "Dipper" was laughing maniacally. His eyes blazed crimson. Then his laughs faded as he took in his final breath.

Mabel rushed over to the Dipper, the real Dipper who still hung from the wall. In seconds she had torn off all the tape and was wrapping her arms tightly around her twin.

"It's really you," she sobbed quietly. And all her pain was forgotten for a moment. The pain of her wounds, of her heart, and of her mind were forgotten, replaced by the comfort of knowing that she had her brother back.

"It really is me," he murmured back. "And I don't plan on being replaced by some shapeshifting villain anytime soon."

Mabel rubbed the tears from her eyes as amusement glittered in them and she smiled slightly. "Nobody could replace you. Because nobody is as dorky as you are."

Dipper scoffed. "Whatever. I think Ford might be beating me in that department."

"I can hear you, you know."

Whew, hope you enjoyed this chapter! The next one will probably be the ending chapter, but I might try to sneak in one more chapter, because I've had so much fun writing this. And please tell me your opinion for a new story, because I literally have no idea what to write first. If you've already voted: Thank you for that. You don't know how much it helps.

Also, if anyone is interested in reading it, I published a one-shot about Dipper getting a little freaked out at the sight of some nachos. Because we all remember the demon nacho... (I was bored, okay?)

Whatever, see you next time! (Sorry if the ending was a bit anticlimactic... *Nervous laughing*)

Grunkle Stan: "SOMEBODY GRAB A GUN, SOME MANIAC IS TRYING TO BRING A LADDER IN!"