Logic Falls

by Arial_Dreemmurr

Rating: everyone
Tags: Equestria Girls, Mystery, Main 7 (EqG), Adventure, Slice of Life, Crossover, Human, Gravity Falls, Alternate Universe, Other
Length: 4452

A pair of twins arrive at their new school and quickly catch the attention of the main 7. They grow a friendship but also soon discover they are no normal kids. Now they just need to find out why while things around them get weirder and weirder.

It's been several years since the events of Weirdmageddon and everything seemed to have been defeated and back to normal.

That was until recently when Stanford found a strong aura of weirdness coming from a small place somewhere on the other side of the earth, which he soon found the reason for.

Now, the pine twins are out on a mission to find out what's going on there, while living the normal life of an average teenager in the process.

And while they are living the normal life at their new school, they find a group of girls that soon grab their attention as they find out more about each other's lives.

The main 7 also soon find the weird side of them and are more than interested to find out more about their new friends, finding a whole new world in the process.

Dipper and Mabel are aged up to High School age. (about 15/16 years of age) They're of similar age as the main 7 during the events of the story.

They still have the same personality and interests as the ones from the show.

Their older design can be seen in the cover art I made.

This is a cross-over between Gravity Falls and Equestria Girls. This is what happens when you get very deep into two fandoms. You fuse them together!

So yea, hope you enjoy the story!

More is on the way! ;b

Published 2021-02-18 14:30:01 UTC
Last updated 2021-02-25 10:16:22 UTC

Chapter 2: Getting familiar.

Something has gone wrong. We don't seem to have an archived copy of that chapter.

Chapter 1: A pair of new people.

Author's Note

Before you start, just know this is my first time writing Dipper and Mabel. I tried my best with this. Also, I just recently started watching, I'm in the middle of season 2 right now, so if I got something wrong, you know why. But I don't mind getting corrected. Though, the story I have in mind will stay the same :)

Now, good luck reading!

Chapter 1: A pair of new people.

It was a morning like any other. Many busses from all corners showed up and brought the students of Canterlot High to their classes. That was, except for one pair who came in a slightly beat-up car.

"And remember kids, answer sheets are in the teacher's desks. Trust me, you're gonna need them." An older-looking man said to them from inside his car before speeding off.

Now, the pair stood at the sidewalk, looking up at their new school. "Woah! It's so big! Do you see that statue, Dipper! It's a unicorn!" The girl said before pointing at it and running towards it.

"Mabel, wait up!" The boy, Dipper, caught up with his sister. "I know it's exciting but we have to keep the focus on our mission." He looked back at her. "You still remember that, right?"

"Of course I do! But that doesn't stop me from having some fun! Now, I want to see the inside!" The girl ran off again. The boy followed as they made their way inside.

Mabel gasped loudly as they entered. "It's even better than the outside!" She noted as her eyes quickly scanned the area. "It looks almost magical!" The girl said as her eyes lit up.

Dipper nodded. "It does look really nice." He said before looking back at his sister. "But we should get going. The sooner we get through that tour, the sooner we can start what we came here to do."

"I can't wait to see more of this place! Let's go!" Mabel ran in one of the paths before her head peeked back out. "Uhm, do you know where we're supposed to go, Dipper?"

"Uhm.." Dipper thought for a few seconds. "My best guess is the principal's office. Maybe we can ask some of the others around here?"

Mabel nodded before running up to the nearest people she saw. "Hey there, I'm Mabel! And this is my brother, Dipper! We're looking for a way to get to the principal's office."

Dipper came to stand next to her. "Yea, all of that. We're new around here."

They just smiled and pointed to their right. "Follow that hall over there and you should see a door with that label."

"Thanks so much, kind strangers! Off to the principal!" Mabel smiled before getting Dipper's hand and walking off.

As they walked through the halls, they saw lots of students look their way as they come past them. Mabel happily waved at most of them as Dipper just kept a small smile up.

They eventually got to a door with the label they were looking for. "Great, we're here." Dipper smiled before quietly knocking on the door. It took a few seconds for the door to open revealing a tall woman with wavy hair. Dipper's smile soon turned shyer. "Uhm... H-Hey principal, miss. I-I'm Dipper and this is-"

"I'm Mabel!" Mabel soon cut in. "My brother's not good at introductions, but I am! We're new here."

Principal Celestia soon showed a smile. "Now that you say it, I was expecting some new students today. Welcome to Canterlot High Dipper and Mabel. I presume you two are here for the school tour?" Both soon nodded. "Then, I'll have principal Luna here with you both soon. In the meantime, you two can come in to pick up your school schedules and learn some of the school rules."

They entered the principal's office and after getting everything they needed, they soon started their tour around the school.

Having been through the first few classes, students finally had their lunch breaks at the cafeteria. So did a group of seven friends that were already together at a table. They were chatting and eating their lunch like usual when one of them noticed something. Or rather someones.

"Hey, who are those two over there with principal Luna? I've never seen them here before." Sunset spoke up before pointing at the pair at the other side of the cafeteria.

Pinkie's head looked up, clearly excited. "They must be new! We have to go greet them! I can't wait to-"

"Now, hol' up, Pinkie." Apple Jack stopped her before she could leave the table. "Looks like they're in the middle of somethin'. Maybe later."

Rarity nodded. "Yea, dear. It would be rude to interrupt them like that."

"Especially in front of principal luna." Twilight continued.

Pinkie sat down again but still looked excited. "You're right, but when they're done I'll be ready!"

They continued their lunch as Pinkie kept a close eye on the new students.

"And lastly, the cafeteria. It is currently lunch break so you two should get something to eat." Luna said before handing them both a tray and showing them the large desks with all kinds of food on them. "So, this should be it. If you have any more questions, you can ask any time. Now, enjoy the rest of your day." Luna smiled before leaving.

The pair looked down at the food in confusion and slight disgust.

"This is the food!? Wendy warned me about this but I didn't think It would be THIS bad..." Dipper said with his face matching the feelings he felt.

Mabel nodded. "Yea... But don't worry, bro-bro, I got you!" She got her bag and pulled out two lunch boxes.

Dipper quickly got his. "Oh, thank goodness you brought actual food with you! Mabel, you're amazing!"

"I know, I know. I do my research too, Dips!" Both laughed as they put the trays aside.

"Now we just need to find a place to sit," Dipper said as he looked across the many tables. "What do you think, sis?"

Mabel took a look at every table and saw one that she liked. "That one!" As she pointed at the table, she quickly saw one of the heads look up in excitement. "Look, they're already greeting us!"

Dipper got doubt on his face. "I don't know, Mabel... That's a full girls group. Maybe I should go sit somewhere else.." He tried to walk away to another table when Mable stopped him.

"No!" Mabel got his arm. "Who cares if you're the only guy there? I want to have my lunch with you! Now let's go sit with them!" Dipper didn't really have a choice in the matter as he was soon dragged along by his sister towards the table.

Once they got there, Mabel quickly showed a smile and introduced herself. "Hey there! I'm Mabel and this is my Brother, Dipper! Can we sit here?"

"Absolutely! Quick, take a seat!" One of the girls, Pinkie Pie, quickly smiled.

Both sat down, with Dipper a little more slowly than Mabel showing a more shy smile.

"You guys are new here, right?" Rainbow Dash said before receiving a nod from both of them. "Well, nice to meet ya. The name's Dash."

Pinkie Pie soon spoke up too. "And I'm Pinkie Pie! It's so super duper exciting to see new people here! I can't wait to befriend the two of you!" She said showing a big smile.

"B-Befriend?" Dipper quietly blushed.

Mabel's eyes soon lit up. "Yes! I'd love to be friends! All of you!" She said as a big smile

"Same for me! This is perfect!" Both girls now smiled excitedly with Dipper quietly sinking into his seat.

Sunset later silenced the two. "Yea, but let's tone it down a little.." She did a gesture towards to other students in the cafeteria only for the others to see they had all eyes on them.

"Aw, man..." Dipper muttered as he tried to avoid eye contact with the big crowd. But luckily for him, most people lost interest quickly and once they looked away, he sat up again.

Sunset smiled now, looking over at the two. "So, anyway... I'm Sunset Shimmer." She introduced herself. "Did you two move or?"

"Yep, We did." Dipper quickly responded, showing a smile. "We're from a small place called gravity falls. Not a lot of people know about it."

"Yea, there's like a whole enchanted forest with monsters and other magical beings! Oh, and a demonic triangle trying to destroy the world! But we stopped him!" Mabel added before she got a certain look from Dipper. "B-But I made that all up just now. None of that is real at all, right Dipper?" She looked over to see Dipper simply facepalm.

"Right.." Apple Jack broke the silence. "Well, welcome at Canterlot High. You're sure to like it here."

Dipper showed a smile as he responded. "Heh, nice to know. But we probably won't be here for long. Just for a little while."

Rarity looked over at him with a confused face, and maybe some blushing. "How so? How long are you staying here?"

"We just got in... Certain situations.." Dipper replied, looking to the side. "And we had to go here. This was the best school nearby so, yea." He finished before letting out a small nervous chuckle.

"You know, my brother's really smart!" Mabel looked over at Dipper with a smile. "At our last school, he was the top of the class! He still is!"

Dipper just got a small smile. "C-Come on Mabel. I'm not THAT smart.."

"Yes, you Are! You got that apprenticeship with Stanford and everything!" Mabel gave him a wink. "Just saying~"

"Well, I guess I am pretty smart. But I don't like to brag about it, you know that." Dipper said before receiving a quick nod from Mabel.

Twilight showed interest now too. "You mean that famous Stanford guy on the news who made a portal to all possible dimensions in the universe!? You know him!?"

Dipper returned a nod. "Yep, he's our Grunkle. But we've only known him for the past few years. It's pretty complicated..." Rarity quickly blushed before he continued. "But that's not important.. We'll only be here for a few weeks, anyway."

"Yea, that's really sad. Especially with so many new people, I'd have to say goodbye to..." Mabel said looking down at her feet.

Pinkie quickly cut in. "Don't be upset! You may not be here for long but that doesn't mean we don't get to have fun! We can have lunch and classes together every day!"

Mabel's smile soon returned too. "Sounds fantastic! I can't wait! It will be so much fun!"

They sat together at the table for the rest of the lunch break and ate their lunches before the bell rang.

"Oh, time for class! Dipper, do you have the schedules?" Mabel said as she and Dipper got off their seat.

"Yea, I got it all in my bag, don't worry." He pulled Mabel's schedule out handed it over.

Her smile changed into disappointment. "Aww, we don't have the same classes.."

"Yea.." Dipper looked down at his before showing her a smile. "But we can meet up at breaks. It's only a few small hours."

"I guess you're right.." Mabel put her schedule in her bag and turned to her new friends. "It was really fun with all of you! I'll be back next time for sure!" She then turned to her brother. "Now, I don't want to be late! Let's go Dip!"

Dipper followed her as they left the cafeteria. "Right behind you!"

As they left, Pinkie yelled towards them. "SEE YOU LATER MABEL!!!" She received a big wave from Mabel before the pair left. When they did, Pinkie showed a smile as she got her bag. "I like them! They're super nice!"

"Yea, I like them too. They're very interesting." Sunset smiled.

"Interesting indeed." Rarity sighed as she put a hand on her cheek, as a dreamy smile got on her face.

Apple Jack was the first to notice. "Ah know that look. You got a new crush don't ya?"

Rarity looked the other way, still smiling. "Maybe, but how can I not? He's like a perfect guy from my romance novels! Smart with a successful career, has a mysterious backstory and he's fairly good looking too~!"

"I can't take this seriously.." Dash said as she rolled her eyes at her.

"Can't either." Sunset agreed before getting her bag. "But if you like him, you do you. We should really get going." They all nodded as they packed up their bags and left for their next classes.

Chapter 3: Returned pressure.

Dipper stood at the entrance of the school for a few minutes before he saw his sister run towards him.

"I'm here! Sorry, I'm late bro-bro!" Mabel said as she tackled him into a hug.

Dipper just laughed as he embraced her. "It's fine Mabel, I didn't even notice." He soon also noticed the button-filled sweater. "What did you do today??"

"Oh, I had art class with Pinkie Pie! You know, from lunch!" She quickly explained. "Look, she also gave me this!" She pulled up her sleeve to reveal the colorful friendship bracelet. "It's a friendship bracelet!"

She looked at her brother only to see his smile turn into something more on the lines of disappointment. "Mabel, I thought you said you wouldn't form relations with anyone here! You're going to end up too attached and won't want to leave when we eventually have to."

Mabel's smile left her face too but more upset at her brother. "I know, but I just can't help it! They're all so nice and I can't possibly spend this time all alone..."

Her brother just facepalmed. "You're not alone, Mabel. You're with me. I'm only telling you what's best." Seeing as her sister was still clearly upset, he decided to try to cheer her up. "But I guess one friendship won't hurt..."

She quickly showed a smile again. "Thanks, Dip! I won't get too attached I promise!"

His smile also returned to his face soon after. Their faces then turned surprised as they were caught off guard by a loud honk outside.

They looked to see their Grunkle Stan honking the wheel inside of the car. "Are you kids coming or what!?" They didn't waste much time and quickly ran to him, before jumping into the car. They each got into the backseat and soon drove off.

Mabel put her bag next to her before looking up at her Grunkle. "Grunkle Stan, have you found a place to stay at yet?"

"Sure did. It's not the biggest, but it will have to do." He soon answered. "It's only a few days or so, I got better things to waste these dollars on."

"As long as we're not on the streets, anything is fine." Dipper shrugged before he continued. "Is it near here?"

Mabel also showed an excited look. "Yeah, I can't wait to see it!"

"Don't get your hopes up, kids." He let out a chuckle. "And yeah, we're almost there. The closer, the less gas I'd have to pay for."

They spend a few more minutes on the road until they eventually stopped at a small stand-alone house. As he said, it wasn't very big, and clearly for no more than three people. It also didn't look the newest. It looked like it had been empty for a while, with parts slightly broken or dirty.

As they stepped into the porch, they looked around at the old building. "Here is it kids. Told you not to get your hopes up."

Mabel just looked at it, her excitement fading a little. "It's... Kind of gloomy..." She muttered, just loud enough for Dipper to hear.

"I mean, right now it is, but I'm sure we'll be able to make it like home." He tried to cheer his sister back up. They both got a smile back on their faces as they entered the house.

It was similar to the outside, definitely not new. Some of the wallpaper was falling off the walls and the floor creaked under them as they took their steps. Now both Dipper and Mabel's smiles faded a little.

Grunkle Stan noticed and spoke up. "Why don't you two find a room. I'm sure there's a room here that you two can sleep in peacefully. I'll get everything ready over here."

The twins nodded before looking across the few rooms the house had. Mabel made sure to immediately deny any rooms that felt too gloomy for her, while Dipper tried to keep it as upbeat as he could for the both of them.

They eventually got to a room that had plenty of space and looked good. "This one looks alright. What do you think Bro-Bro?"

"I think so too. Now, let's get our stuff in." He replied before they entered and placed their bags into the room.

There was already a bed in there that Mabel soon claimed as her own. Dipper decided to go to another room with a bed and try to get it in.

It was a simple bed you could fold and easily get from place to place, clearly meant for traveling of some kind. Mabel's was obviously fancier but he was glad we would be able to get it into the same room without much trouble.

Seeing as his sister's bed was on one side of the room, he decided to put his bed on the other side. It would also help with the feeling of home they were trying to create.

He placed the bed down and made some space around it. Grunkle Stan would handle the other stuff they brought with them so they only had to do their own room.

He looked over at his sister's side to already see her decorating her side. That's when he remembered something.

Opening his bag, he soon pulled out the birdhouse he made that day. "Hey, Mabel. I made something today, I thought you'd maybe like to decorate it?"

She turned around and saw the birdhouse. "That's so cool! I'd love to decorate it! Just imagine little birds living in there!" He handed it over to her and she sat it down at her side of the room.

Dipper smiled seeing his sister happy. Even though she was the most optimistic about their trip, he knew she wouldn't want to stay for long in a place like this. That's why he got his bag, ready to get back to work to make their time spend here as short as possible.

He had two bags. One from school and one he got from Stanford to bring with them. It was of a big size and had as much of what they needed in it as possible.

They had looked into the situation a lot while they were still in Gravity Falls and decided they were close enough to the answer to go out a search it out. Together with his sister, he was trusted in the responsibility to find it and destroy it forever.

He opened the bag and laid everything out in order on his bed and some on the ground since it didn't all fit. He also put up a pinboard on his wall and attached many pictures and clues to it to keep track of their mission.

He was pinning all the evidence to the board when he heard his sister's voice behind him. "You're already busy with solving the big mystery? I thought you'd want to get to know the area first."

He turned before responding. "Yeah, but who knows how much time we have. Someone could get there before us and cause the end of the world without even knowing it."

"I know, but you're acting kind of paranoid. I doubt anyone even knows about Bill here. Let alone know about the statue." She shrugged before showing her brother a smile.

She saw him look away, determination still on his face. "I can't risk the possibility. Stanford trusts us with the responsibility. If we're too late or fail to stop him, what would he think of me then?" She watched as his face turned into a mix of fear and anxiety.

"You're still worried about that?" He gave a quiet nod before she continued. "Dipper, he might have seen you as just a kid before, but you've already proven yourself to him more times than I can remember. Why else would he trust you with something as big as this?"

"I know, but the pressure to succeed hasn't been this big since weirdmageddon happened. Our whole existence is on the line, Mabel! Those are some BIG stakes!"

Mabel walked over to her brother and put a hand on his shoulder. "We won't fail Dip. We'll find a way to defeat that demon once and for all! But we'll take our time with it. I don't want any more sleep deprivation from you!" He looked back at her, a smile appearing on his face.

"Thanks, Mabel." The twins shared an embrace before Dipper turned back to his bed. "I'll just put it all up and then I'll connect the dots later."

Mabel soon showed a smile. "And?"

He just rolled his eyes as he gave his answer. "No late nights." Both twins showed a smile before Mabel went back to her own side of the room.

After some time, they had all their stuff how they liked it and soon found their Grunkle fixed up other areas of the house too. At least as much as he felt was necessary.

As dinner, Stan ordered a simple pizza that would be enough for the three of them. The cheapest one, of course. Soon after that, the twins returned back to their room.

While Mabel was busy decorating the birdhouse, Dipper put his attention to the mission. He already had everything where they left it, he just had to connect the dots and unravel the secrets and mysteries until they could get an exact location.

As he got more and more answers and new questions to answer, he started clicking the back of his pen. "Hmm... But if that was the case why would it-" He thought before something else unexpected filled his vision.

"Look!" It was Mabel who proudly showed her brother the decorated bird's house. "All done! I'm going to put it up somewhere outside!" Mabel yelled excited before running out of the room, her excitement making him smile.

Once she left, Dipper turned back to what he was doing. But it wasn't long before he got interrupted again by the sound of his phone. He looked and saw the call was from Stanford. He made sure to quickly answer, not to keep him waiting.

He soon heard his voice on the other end. "Good evening, Dipper. How's the trip so far? Are you getting any closer to finding his location?"

"The trip is fine." He continued, growing a smile. "And I just connected another dot. From here, it seems to be coming from the west. I think I'm getting close!"

"That's good to hear." Dipper felt his smile getting bigger, hearing his words. "Have you found any specific locations? Anything to put on a GPS or map?" He questioned again,

He quickly looked through some of his previous notes, looking but failing to find anything specific. "Not yet... I only just found that last thing. But I'll find him, don't worry."

He heard a chuckle on the other side. "I'm not. I know you and your sister were the right two for the job. I know you won't disappoint." He felt some of his previous anxiety come back up before he heard him continue. "I'll call again tomorrow around the same time to hear your progress. I'll talk to you again then."

He quickly pushed it back, before giving a response. "Sure! You can count on us, Grunkle Ford." Was the last thing he said before the call ended.

He looked back at his notes. "I've... I've got to up my game. I need to have more information to give when he calls again." He felt more of the previous responsibility weigh on him, before going back to what he was doing.

It was sometime after that, that Mabel returned. "I'm back Dippin' sauce! Now we just wait for the birdies to come!" She walked into the room to see his brother busy, more serious than before. "Uhm, Dip...?"

"Oh, hey Mabel." He simply said, too concentrated on what he was doing to look away.

Mabel decided to walk over to her brother to get his attention. "That's all?" She only received a small hum from him so she decided to take the papers from under him.

"Hey, what was that for? I was in the middle of something!" He yelled before attempting to get it back from her.

She got it out of his reach before giving an answer. "I was gone for just a few minutes. What happened, Bro-Bro?"

She saw him let out a small sigh before he started explaining. "Stanford called for progress. He's calling again tomorrow so I wanted to have more to tell him when he does." He got a smile. "You know, to maybe impress him a little."

Mabel showed a small smile, before giving him his papers back. "Alright then. But I don't want you going on for too long. It's getting pretty late." She pointed over at a nearby clock before she continued. "And I'm sure he wouldn't mind you taking a break."

Dipper showed her a smile. "I guess you're right. I'll just tie up a few loose ends I have left. I promise I won't make it too late."

"I'll keep you on that! I'm keeping my eye on you Dip!" Both laughed before she returned to her side to partake in one of her own activities.

Slowly but surely, Mabel reached out to the night lamp she had. "How about we call it a day. I'm tired." She finished, letting out a yawn.

After closing his books and putting his papers back in their maps, Dipper nodded. "Yea, let's do that. I'll continue the rest tomorrow." He put all of his stuff aside and soon Mabel put out the light, letting the room get dark.

Author's Note

Another smaller chapter. The next one will be longer so it will probably take a while longer. Until then, I'll leave you all with this!

Please be patient, and I'll update soon!