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English
Series:
Part 1 of Illusion IS Reality
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Illusion IS Reality, Reincarnation and Transmigration, ✨An Assortment of DAMN Good Fics✨, fantastic_fics, Long Fics to Binge, The 1412's Library of Good Reads
Stats:
Published:
2018-01-06
Updated:
2026-06-01
Words:
3,721,504
Chapters:
323/?
Comments:
3,881
Kudos:
1,982
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328
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152,851

Illusion IS Reality

Summary:

In which a GF-fangirl wakes up to find herself in the body of a baby Bill Cipher before the events of canon happens. Welp, lets see how much she can fuck this up.

(Updates once every other week)

(Now canonically a shared universe with the Triplet AU, Dimension 46'/-A and One Way(to absolve his crime))

IMPORTANT NOTE: Ok, so I've decided to just put a warning right here about BlueBill from Dimension 46'/-A. He's not a good person, and is going to trigger a lot of people. Also putting up an angst warning for when things get super emotionally draining as a result of BlueBill and other terrible things making MizBill spiral into depression.

This is backstory, character exploration, slice of life and very much a cradle to the grave sort of thing. And... apparently the romance is finally coming up. Woop?
This is not meant to be taken seriously, it's just a stupid idea I'm writing for fun.

Notes:

Chapters 0-10: Flatland Arc
Chapter 11-69: Space Adventures Arc
Chapter 70-99.1: BlueBill Arc
Chapter 100: A quick Stop home and then off to Sebastian's Dimension for the Slices of Life Arc
Half updates will be over at Slices of Life and Family since Bill is hanging out there
Chapter 101-132: The Earth Develops, more crossover with BlueBill
Chapter 133-Current: Back to space adventures/domestic adventures

Disclaimer, I do not own Gravity Falls. This fic is inspired by things said by Alex Hirsch, many fanart and fanfics I’ve seen. There will be pop culture references, there will be song lyrics, there will be memes. You have been warned.

I wanted to try something different, how well I succeed is up to debate...

(See the end of the work for other works inspired by this one.)

Chapter 1: Prologue

Notes:

Ok so... AO3 apparently nerfed the number of tags I'm allowed to put on a fic, so almost half of my tags are now gone. WTF AO3??

(See the end of the chapter for more notes.)

Chapter Text

-Reality is an illusion-

Prologue

I blink my eyes open, when had I closed them? Something was wrong. Everything felt strange. I blinked again and realized I only had one eye. What? How?

A car horn blared, the sound getting louder and closer. Their headlights blind me.

I reached my hands up to touch my face. Thin black limbs, like tubes came into view and I blink at them, stunned. These are mine? I wiggled my little fingers, they were kinda cute but what was going on?

I finally began feeling up my face and if it weren't for my ability to stay rational even during a panic attack...

I was calm even when the car was flung into the air, my side of the vehicle was crushed in.

...I'm sure I'd have been freaking the fuck out right now. Flat and smooth, it didn't feel like skin. It was harder and warm to the touch. Firm when I pressed down, none of the squishiness I expect from flesh. I felt around my head and found that there was no difference between my head and body. I found my legs, thin and black like my hands. It felt weird, knowing that my entire body seemed to be just one large head and tiny limbs.

Weightless, I was floating. As if gravity no longer was. The world outside the windshield was rotating.

I realized I was lying down on my back. Everything was flat. Why? I couldn't sit up. No leverage. A flat body lying on a flat surface. Like a piece of paper stuck to a table via some static cling along its surface area. I pushed against the ground with my arms, I wiggled and kicked my legs to try and lift myself. With more effort that it really should have taken I managed to heave myself into a sitting position.

The heavy thump as gravity reasserted itself. I hear the crunch of glass and metal.

I was on a bed. I can feel the sheets beneath me now. I scanned the room, white walls, white ceiling, white sheets. White, white and more white. Was this a hospital? No, there were no machines or medical smells. How can I smell when I have no nose?

I hung from the seatbelt. Dangling upside down from the restraints. The edge was digging into my throat.

The room was huge. Rooms have always seemed big to me. I'm small, always been smaller than everyone else. But this was even larger than usual. Where was I?

His voice is frantic as he shouts my name. He's reaching for me as he hangs suspended besides me. I tell him I'm fine. Am I fine? I think I'm in shock.

Aside from the bed I was sitting on there was a triangular(?!) door on the other side of the room, a half open closet, a set of drawers...essentially it looked like a bedroom. A very plain bedroom. Why was there no color? I tried to stand but my body felt weird and it was hard to balance on these thin limbs. Is this what it was like to be flat? All this wobbling back and forth?

He says he smells gas. There's a leak. We need to get out.

As I struggle I hear the door open and look up to see a triangle. A large orange triangle with a single eye blinking down at me. I immediately understand what was happening. I've read so many fanfics about moments like this. To confirm my theory I try to look down at my body, unconsciously stretching my frame to bend forwards.

I see yellow bricks.

Well. Fuck.

We don't get out in time. The last thing I remember is a searing heat.

-The universe is a hologram-
-End Prologue-

Notes:

AN- So...yeah~ I wanted to try something really different. Not sure where this is going to go. I have a bad habit of coming up with ideas and not really planning things out. I just write as inspiration strikes.

-Whispers- maybe that's why I'm such a bad writer~

If anyone wants to Beta for me, please message me. I literally have no idea what I'm doing.