Disclaimer: Gravity Falls belongs to: Disney

Gravity Falls Forest 2:00 pm

It was a usual day at the Gravity Falls forest, the birds were singing, the beavers were biting down some trees, woodpeckers were hammering some dead trees to find food, nothing was out of the ordinary.

A woodpecker left flying scared as a 12-year-old girl, Mabel Pines, arrived at the branch the woodpecker was in. Mabel continued to jump from tree branch to tree branch while her twin brother, Dipper Pines, was following her on foot.

"Mabel, we need to go back to the mystery shack!" called Dipper. "I never told anything to Stan, and you know how angry he gets if we don't go to work!"

"Chill out Dipper, it won't take too long before we're over with this." said Mabel. "Keep following me and we'll eventually arrive at that transformation crystal I told you about."

"Mabel, get down here immediately!" called Dipper. "We need to get back to work!"

Mabel stopped on a tree branch and jumped down to the ground as Dipper catched up with her. After that, Dipper took a few minutes to regain his breath and grabbing a not-wanting-to-go-back Mabel.

"Now, follow me back to the mystery shack." said Dipper.

Dipper turned around and as soon as he took a step, Mabel released her hand from Dipper's grasp.

"Come on Dipper, you love stuff like this, why don't you want to see the transformation crystal?" asked Mabel. "Your book says something about a transformation crystal in the forest and you just wanna return to the shack!"

"Well, it does say something about transformation. And it would probably be a great discovery." said Dipper. "But Mabel, the first thing we need to do is think about the consequences if we do succeed and go super mode."

"And those could be?" asked Mabel uninterested.

"We could go out of control, the power source would take a mind of its own and try to control ours, we could even go on a rampage across Gravity Falls-"

Before could keep on the list of predictable results from the transformation, Dipper saw that Mabel had left. Looking around, he spotted her up at the tree branch and resuming the way she was going, prompting Dipper to run after her.

"Mabel, wait!" called Dipper. "Could you at least hear out the possibilities?"

"Sorry Dipper, but if you're only gonna list the negatives instead of the positives of this possible new discovery, I can't say I'll be interested." answered Mabel "Try to think positively, we could be able to fly, gain enhanced senses-"

"Go out of control, be unable to recognize friend or foe?" interrupted Dipper.

"See? There you go again!" complained Mabel. "If you're gonna worry so much, why don't you go back to the shack?"

"I can't leave without you!" answered Dipper.

The twins continued to complain until they arrived at a giant tree, where Mabel jumped from tree branch to tree branch until she was out of sight. Dipper climbed one of the trees and jumped from tree branch to tree branch until he got to the tallest branch.

"Mabel!" called Dipper at the top of his lungs, but receiving no response.

Slowly jumping back to a previous tree branch, Dipper jumped down one branch until he arrived at the branch of a normal tree, where he safely felled to the ground and started to look for Mabel.

One search later

Dipper had searched everywhere, but he could not find Mabel anywhere.

"Hello, little brother!" greeted a voice in the sky similar to Mabel.

Dipper turned up to see where the voice came from, and he couldn't believe what he saw. It was Mabel, but she was a bit different.

Mabel's sweater, shoes, and facial features hadn't changed at all. What changed was her hair, which instead of being chocolate-colored was now beige and the hairstyle was a bit more spiky, her eyes were now a cerise color, and she was being surrounded by a sky blue colored aura.

"So, what do you think?" asked Mabel, crossing her arms. "Do I look super or not?"

"M-Mabel, y-you're... you're-" said Dipper,

"Flying? Yeah, I'm doing that." answered Mabel. "I told you we could get the ability to fly with the transformation crystal, but no, you just decided to go negative instead of positive."

"B-But how did you transformed? You're a human." asked Dipper.

"Oh that." started Mabel before explaining. "By chanting something in front of the crystal, it gives the one who chanted it a super form to transform into."

"You never said anything about that!" exclaimed Dipper.

"I thought you already knew, its in the book, little fool." said Mabel. "Anyway, want me to take you to the crystal?"

Dipper started think about what he could do, he could either go back to the shack without Mabel or accept Mabel's offer and go with her to the crystal of transformation she said. After considering what could happen if he declined; Stan would get angry, and everybody would search to no ends for Mabel, he decided to accept.

"Fine, but with one condition." said Dipper.

"What is it?" asked Mabel.

"After the transformation's time is over, we'll go back to the shack, no questions asked, understood?" answered and asked Dipper.

"Yes mom, we'll do as you say." said Mabel, turning around. "Now grab the back of my sweater so I can fly us there."

Dipper did what Mabel told him to do, and she left flying as fast as she could to the location of the transformation crystal. While they were flying, Mabel showed a lot of joy while Dipper was deathly afraid, holding the back of Mabel's sweater tightly so he would not fall.

Mabel stop on they arrived at a big space not too far from the river, where a giant golden crystal was hovering above the ground. Mabel slowly descended to the ground and, after safely landing on her feet, Dipper released his hand from Mabel's sweater and started to pant heavily.

"There's the crystal." told Mabel to Dipper, pointing at the golden giant crystal. "Now say the chanting on your book and bingo, you'll transform."

Dipper took out his book from his vest and saw a random chanting on the transformation page. As he said the chanting, the crystal started to glow as a golden circle surrounded Dipper and, once he finished the chanting, enclosed him inside an orb. Dipper started to feel funny as his body changed to his newest super form, the orb he was surrounded disappearing after he finished transforming.

Just like Mabel, his clothes, shoes and facial features hadn't changed at all. And just like Mabel, his hair color changed from brown to beige and the style became a bit more spiky, however, his eyes changed to an apricot color instead of Mabel's cerise and unlike Mabel, his aura was neon green colored.

"Wow... this power." said Dipper, feeling his newest acquired form power inside himself. "Its feels totally out of this world."

"Okay okay, stop acting so surprised." said Mabel, walking to Dipper. "Now, I have just been in this form for 5 minutes, but I'll tell you all I have been able to discover, you don't need to know the flight thing since you already saw it, so I'll tell you about our enhancements."

Mabel snickered when she said the word "enhancements", before she returned to normal to explain Dipper a few things.

"Now first, in this form we have enhanced strength." said Mabel.

To demonstrate it, Mabel walked to a nearby tree and, using her bare hands, ripped it from the ground and threw it far away. Dipper couldn't believe what he just saw, his sister using her bare hands to rip a tree from the ground.

"Enhanced speed." said Mabel.

Mabel went running to Dipper, leaving after-images of herself colored like her aura, which disappeared once Mabel stopped in front of Dipper.

"Teletransportation." said Mabel, disappearing in front of Dipper's eyes. Mabel reappeared behind Dipper, with him not noticing her presence.

"Peek-a-boo." said Mabel, spooking her younger twin brother. "And best of all, we can shoot energy from our palms!"

Mabel and Dipper turned to the river nearby them and as Dipper payed attention to Mabel's palms, she started to accumulate her energy into two energy balls in her palms. Once she put enough energy, she threw the energy balls at the river, causing a small explosion when they collided.

"Of course, some of these stuff consumes some energy, but we'll regain it over the time." said Mabel, turning back to Dipper. "And... that's all I can teach you, 'cause I don't know anything else."

Dipper started to revise what she learned from Mabel, but once he turned to see a random patch of trees around the place they were, he saw a vision of Wendy approaching their place, the only problem was that it wasn't clear if the vision was real or not.

"Mabel, did you saw that?" asked Dipper.

"Saw what?" asked Mabel.

"Wendy's coming to this place." answered Dipper. "I don't know if its real or not, but we should hide nonetheless."

"Dipper, there are only trees over there." said Mabel. She changed her mind once she heard somebody approaching them. "But on second thought, let's hide."

The twins hided behind a random bush as they saw Wendy arriving at the scene, just like in Dipper's vision. However, all Wendy did was see the river with a pleasant smile on her face. Seeing an opportunity to briefly leave, Dipper left the bush to see what Wendy was doing and then returned to the bush with his sister.

"What is she doing?" asked Mabel.

"She's only seeing the river." answered Dipper. "I think we're safe for now."

"Huh, I always feel relaxed when I see the river." said Wendy, now turning to the crystal. "Well, what is this?"

Interested by the hovering crystal, Wendy walked to it and touched it, leaving it alone once she was unable to hold it for too long . As Wendy panted, she looked at the bush Dipper and Mabel were hiding and, for some reason, was able to feel their presence inside.

"Well, I can't take this thing back to the shack." said Wendy. "So I guess I'll just go my way."

Wendy started to leave. But as Mabel and Dipper sighed in relief...

"Hey Dipper, Mabel." called Wendy to the bush Dipper and Mabel were hiding. "Could you help me get this thing to the shack?"

Mabel and Dipper got out of the bush and helped Wendy carry the crystal out of the forest and to the mystery shack.

Outside the Mystery Shack

Mabel and Dipper put the crystal on the ground, and after a while it started to hover again.

"How did you knew it was us?" asked Mabel.

"The bush was surrounded by a sky blue and neon green aura, and touching the crystal allowed me to sense your presence." answered Wendy. "By the way, thanks for helping me bring it to the shack."

"No problem." said Dipper.

After Dipper said that, the twins returned to their normal form as Stan arrived to see the crystal Wendy and the twins brought.

"This is exactly what the mystery shack needed." said Stan. "Where did you found it?"

"In the forest." answered Wendy.

"... Makes sense for me." said Stan, grabbing the crystal. "Now help me get this inside the shack so we can put it on exhibition."

The twins and Wendy also grabbed the crystal and helped Stan get it inside the mystery shack, and then helping him set up its exhibition afterwards.

Mystery Shack, Dipper and Mabel's Room 7:00 am

At their room, Dipper was checking the book to see the other details about the transformation while Mabel jumped on her bed, overjoyed at the fact that she now had a super form.

"I can't believe we actually have super forms now!" said Mabel in excitement. "What do you think we should call ourselves in that form? The Awesome Mystery? Super Sisbro? Oh I know, Super Mystery Twins!"

"Mabel, please be quiet for a minute, I'm checking the other details about the transformation." requested Dipper, his vision fixed on his book.

"Ooh! Let me see! Let me see!" exclaimed Mabel, jumping to Dipper's bed.

"Let see, we can only stay in the transformation for 15 minutes until we master it, until we attain some sort of necklace from mastering our form, we'll need to use its power, and getting hit enough times, having our energy absorbed or whatever will end the transformation prematurely." said Dipper, listing the things. "Oh, it also ends prematurely if we want to."

"Aw man." said Mabel.

"Well, let's not think about it too much." said Dipper, closing his book. "Let's just go to sleep."

"Yeah, so tomorrow we have energy so we can fight to see who's the best!" said Mabel.

"Haha, Mabel, just go to your bed." said Dipper.

Doing what Dipper said, Mabel went back to her bed and toked herself before she reached for her grappling hook.

"Goodnight Mabel." said Dipper.

"Goodnight, super bro." said Mabel.

Aiming her grappling hook at the lampshade, Mabel shoot it and broke the lampshade to turn it off. After that, Mabel fell asleep while Dipper stayed up for a few seconds before falling asleep too.

"You know, that wasn't necessary." said Dipper, before falling asleep.

To be continued...