Okay folks. This is gonna be my first multi chapter fanfic. And I'm gonna admit that I had this idea since last year, but I decided to wait for the show to finish so I won't have that many continuity errors. Anyway as the summary stated, the plot is basically the Pine twins having to save the multi-verse with the help of their different personas from the wonderful Au's our Fandom has created. If you want a certain Au to appear, suggest it in the review or Pm me. Either way I hope you enjoy the first chapter of "In Reverse in the Multi-verse"

Guide:

"Bold": Tad Strange

"Italicized": Will Cipher.

Disclaimer: I do not own Gravity Falls. It is a property of Disney and brought to us by the wonderful Alex Hirsch.

I also did not come up with any of the Au's mentioned or hinted at in this chapter.

The Tent of Telepathy was filled with a grim silence which was soon interrupted by the sudden entrance of a dark figure, followed by another.

"I can't believe we failed!" Growled the first figure, who was revealed to be Dipper Gleeful, one of the stars for the Telepathy Tent and Gravity Falls local Celebrity.

"We may have failed on getting Journal three but at least we got back the second." Replied his twin sister, Mabel, as she leaned her back against a cabinet and began to toy with her dagger.

"True." Hummed Dipper in agreement before frustration crept back in his tone. "But it has no use without the first or third." He declared as he opened Journal Three.

"Curse Gideon and Pacifica!" Mabel shouted, her tone filling up with venom as she growled the blonde girl's name. Quick as lightning, Mabel swiftly threw her dagger at the picture of Pacifica Southeast that hung on the wall of the room.

Dipper tried not to flinch as the dagger hit its target, his mind drifting to how last summer the girl had helped the twins with a ghost at the Manor. He would never admit it to Mabel but he ended up revealing a bit the vulnerable side his family held and showed how damaged he and Mabel actually were underneath their stoic mask. The blonde had reassured him he could change, and at first it seemed things were looking up but it didn't take long for things to fall back in pattern, with Gideon, Pacifica and the twins once again at each other's throats.

Dipper shook his head, in an attempt to get these particular thoughts out of his head and placed his hand over his glowing amulet, using the magic to flip through the pages of the journal. "There must be another way to get the other two." He mused.

"Maybe there is." Said Mabel as the stone on her headband began to glow and the dagger stuck on the marred picture returned to her waiting hands. She twirled the weapon in the air in a lazy manner before adding with a smirk "We can always ask that demon pest."

Dipper turned to face his sister with a quirked brow. "You mean Will Cipher?" He asked.

Mabel nodded her head. "Wil may be a weak demon but he may have connections." She pointed out. Dipper hummed thoughtfully in consideration before his amulet stopped glowing and he snapped his journal shut.

"Get ahold of the chalk. I'll get the candles." Dipper demanded.

Mabel smirked and gracefully walked out of the room, with a slight skip to her step. "As you wish, Brother."

Mabel smiled as she finished drawing the summoning circle on the ground. Tossing her head back, she made her way over to her waiting brother who already had his journal opened.

"You weren't getting impatient, were you?" Mabel asked with a slightly taunting tone. Dipper rolled his eyes and slightly clucked his tongue.

"We don't have all day." He coldly nagged.

Mabel simply smirked before grabbing his hand. "Of course." She replied.

The twins both closed their eyes before bowing their heads. "Egassem Esrever, Egassem Esrever, Egassem Esrever." (1) They simultaneously chanted. The world slowly turned black and white, and timed began to slow. Suddenly a blinding light flashed throughout the room. As the twins chanting slowed, the light began to slowly dim, until they stopped.

A moment of silence passed before a timid voice rang out through the room. "Y-you c-c-called?"

Dipper smirked as he took in the sight of the triangular blue demon. "Will Cipher, long time no see." He drawled. Will's eye widened in panic as he realized who summoned him.

"Y-y-ou?!" The dream demon cried out as he fearfully flinched back. He closed his eyes as he tried to vanish away, only for chains to suddenly appear, wrapping around his legs and arms.

He looked up to be greeted with the sight of a smirking Mabel, whose arms were crossed across her chest, the gem on her headband glowing. "Leaving so soon? Why, we haven't had a chance to strike a deal." She taunted.

Will struggled helplessly against his bounds before he slumped down in defeat. "W-what is it you want?" He asked, fearing the answer. Dipper and Mabel exchanged a smirking look before turning to the dream demon.

"We want a way to get all three of the journals." Dipper began.

Will eye narrowed in concern. "H-h-how am I supposed to do that?! You know I have no such powers." He protested.

"We know." Mabel replied, before confidently striding forward. "That's why we want you to call up another one of your demon friends."

The dream demon looked at them in panic. "You don't know what you're asking for!" He cried in an attempt to disway them. Dipper and Mabel's gaze hardened.

"Have you forgotten the punishment you earned yourself last year from your reluctance to help us?" Dipper coldly asked. Will visibly flinched, as he recalled the previous year. He had failed to fulfill the Gleeful twins wishes and as punishment he became the twins slave for a year. It wasn't exactly the happiest time…

"Well…" Mabel impatiently said awaiting Wills answer. He closed his eye and suppressed a shudder as he thought of what they were asking for.

"V-very w-well…" Will said finally. Dipper and Mabel both exchanged a smirk before turning back to Will.

"Let's began then." Dipper declared.

Will closed his eyes before chanting, "Ecap Ytilaer eht Egnahc Yam Ohw, Egnarts Eht Fo Ytinirt Eht Fo Nomed Dnoces Eht Nommus." (2)

Dippers and Mabel furrowed their brows as the room began to rapidly spin. Everything blurred around them, and a sudden wind swept through the room. With a boom, and a flash of a bright light, the Gleeful twins were sent flying back. A cackle rang out through the room as the light faded away.

"Ha-ha-haha-ha-ha!" A blue demon cried out in a devilish laughter. Mabel and Dipper stared at him in shock. He was blue and had one eye, like Will but the resemblance stopped there. The new demon wore a black tie and a bowler hat, and was square shaped. The biggest Difference however was the fact that this demon has an aura of power.

A moment passed before the Demon laughter died down. Giving satisfied sigh, The demon wiped his one eye as if he was wiping away tears before looking around the room. He gave a small hoot at the sight of the Gleeful Twins. "Well I'll be, if it isn't the famous Twins, my brother would always talk about." He proclaimed, before taking a closer look. "Opps, my mistake!" He gleefully corrected, "This is Will's set. Speaking of which..."

The square Demon turned to face the cowering triangle. "Will! Long time no see! Have you forgotten all about me? I am most offended if you did." He cried. Will looked fearfully at the other demon.

"O-of c-course n-not!" He protested. The new demon cackled as multiple copies of himself surrounded and elbowed Will.

"Well I hope that's the truth! What kind of Demon avoids their brothers!?"

"Brother?!" Dipper and Mabel both said in surprise. The Square shaped demon turned to face the twins and feigned a gasp.

"Why Will! You never mentioned me? How Rude!" He proclaimed before hovering near Dipper and Mabel. "The name is Tad, Tad Strange." He said as he introduced himself. (3)

Dipper and Mabel opened their mouths to introduce themselves before they were cut off by Tad. "No need for introductions, I already know who you are." Tad calmly stated. With a snap of his fingers, Tad appeared at Dippers side. "You're Dipper Gleeful. You hate not knowing things and absolutely loathe feeling helpless when things aren't in your control." He proudly stated. Before Dipper could even react, Tad vanished before appearing by Mabel's side. "And you're Mabel Gleeful. You have a fear of People looking down on you and thinking you're silly." Tad snapped both of his fingers and appeared in front of both of them. "You two are extremely protective of each other and will go at any means necessary to avenge the other. You also fear disappointing your parents because one slip up could lead to-"

"THATS ENOUGH!" Dipper cried out interrupting the demon. Both he and Mabel were pale from shock at the how much Tad knew about them and they both had a look of Paranoia. His chest heaved as he took a deep breath before looking at Tad. "We want you to do us a favor." Dipper sternly said as he tried to get the situation back under his control.

Tad's eye twinkled in amusement as coyly acted as if he was examining his fingers. "I know. You want me to help you get the other two journals so you can gain world domination. I'll agree, you do me a small favor in return and Bing-Bada-Boom my job is done and you two get what you want. Talk about Boring!" Tad proclaimed. Mabel and Dipper blinked in surprise before narrowing their eyes.

"What is that suppose to mean?" Mabel asked, mild disdain her voice.

Tad casually shrugged before answering. "All I'm saying is that conquering all the alternate dimensions including the anchor is where it's at these days." He casually stated with a shrug.

"Alternate dimensions?" Dipper asked confused. He knew there were alternate realities considering Demons like Will and Tad were obviously not from his and Mabel's reality but from the way Tad was talking about it, Dipper couldn't help but realize he was talking about something more.

Tad chuckled turning to his brother. "Will, you never told them about the alternate universe?" He asked Will.

The Blue triangle shook his head. "I n-never s-saw the r-reason too." Will stuttered.

Tad tutted in disappointment before turning to the twins. "I have to explain everything, Don't I?" He said with an exaggerated sigh.

Mabel and Dipper exchanged a look of confusion before turning back to Tad Strange. Tad closed his eye for a brief moment before opening them once again. An Image flickered in front of them, Tads eye acting like a projector before the Image moved off to the side and hovered near by. Once again Tad closed and opened his eyes another Image appearing before it went to the side. The pattern continued until the room was brimming with multiple images.

Mabel and Dipper peered into each image only to find that it was more of a looking glass into another world. The thing is each one, while each one were different, they all held something familiar or recognizable to the twins. One showed a twelve year old redhead and a pudgy boy running through the town with the third journal in hand. Another one showed Dipper and Mabel, the first reading the journal and the latter swimming in a river. However a surprising detail was that Dipper had the bottom half of deer instead of legs while Mabel herself had a mermaid tail. They blinked in surprise and peered into another image. This one consisted of two twins, but they weren't Dipper and Mabel. With a start, Dipper realized they bared a resemblance to their great uncles. The one wearing glasses was holding a journal with a pine tree on it.

"W-what is this?" Mabel asked.

Tad cackled happily as he took in the twins surprised expression. "You two didn't think you were the sole reality, did you?" Tad mockingly chuckled. "Hate to break it to ya, (not really)" Tad began, adding the second part under his breath, "But your reality is just an expandable branch compared to the core and anchor one."

"What do you mean?" Dipper asked.

"What I mean kid, is that your world is just a representation of "what might have been" for the anchor." Tad stated. With a snap of his finger another image appeared in front of the twins, bigger and brighter than the others. "This is the one that really matters. If it wasn't for this one, you wouldn't exist!" He proclaimed.

Dipper and Mabel both peered into the Anchor dimension. Dipper eyes widen as he took in his alternate persona. The lanky teen was wearing an orange shirt and a navy blue vest similar to what Gideon regularly wore, but this alternate Dipper was wearing jeans and a lumber jack hat. Meanwhile Mabel was regarding her Anchor self with mild disgust. The alternate Mable was wearing a bright, fluorescent Pink sweater and knitting away, making another. A pig laid at her feet.

"Doesn't look too important." Dipper muttered.

Tad shook his head and crossed his arms. "Trust me kids, it was these two that put my brother into decommissioning."

"Who? Will?" Mabel asked.

"Nope." Tad answered. He snapped his fingers once again and the image blurred before it once again returned to focus. Dipper and Mabel's eyes widened as they took in the sight of a triangular statute of a Demon that bared some resemblance to Will. However, even through the alternate gate way, they could sense this Demon's power.

"So you see kid, conquering your reality is gonna be worthless, practically nothing." Tad declared. "However, I can offer you something worth your time."

Dipper cautiously raised a brow. "And that is?" He carefully asked.

Tad leaned closely to one of the images of an alternate reality. "You see kid, If you manage to get one item from different person who belongs on this wheel, from a different dimension," Tad began to explain,( When he mentioned the wheel, he snapped his fingers bringing up an image of the cipher wheel) "And obtain one of the journals from the Anchor dimension, not only will you be able to conquer one or two of these alternate realities, but you will be able to gain the power to conquer the entire multi-verse!"

Dipper and Mabel eyes widen in a mixture of surprise and greed. "However, all I ask is for your help to restore my brother to his former glory." Tad began gesturing to the image of the statue of the demon, "In return, we'll help you with your little quest." Tad offered.

"What do you say, do we have a deal?" Tad questioned, offering a flaming hand to Dipper and Mabel.

Will looked fearfully as he watched the twins exchanged a glance between each other before nodding their head and grabbing ahold of his brother hand, giving it a firm shake.

"Deal."

Well, theres the first chapter of "In Reverse in the Multi-Verse" Here are some easter eggs or random stuff I should explain from this chapter.

(1) and (2) Are a reference to the show having the habit of having Characters say or proclaim Stuff by saying it backwards. See if you can figure out what they say. ;)

(3) is a reference to how most of the fandom assumed and Theorized that Tad Strange was gonna be a dream demon to appear at some point in the show. Instead Canon gave us Tad Strange, a human who is the only normal one in gravity falls. However I liked Tads demon fanart so I decided to include him.

Anyway, I love to see your thoughts on the first chapter, receive any advice so I can improve my writing and see if you recognize any of the Au's I referenced. Feel free to drop off an review or request an au to appear.

Until the next update, thegirlwholived91