A/N: I need an editor. If you want to help, read the ending author's notes for details.
"OK, our first lesson is going to be on friendship. What I want you to do is go with Pinkie-" Fluttershy began.
"With her? But then I would have to avoid getting killed!" Twilight interuppted.
"...I want you to go with Pinkie and pull a prank on not me, but the other me." Fluttershy said, after being rudely interrupted.
"Um, how is that a lesson on friendship? I mean, it would be like throwing a water balloon at you as soon as I met you. And wouldn't that also be considered dimensionist(the hating of a particular dimension)?" Twilight questioned.
"...Because it helps you learn how to get along with Pinkie. And I'm not dimentionist! I just happen to hate my old self...a lot. Now, I will tell you the prank...." Fluttershy said.
THIS PART IS CENSORED BECAUSE THE AUTHOR DOESN'T WANT YOU TO KNOW THE PRANK. ...I DO TO HAVE ONE IN MIND!!!!!
"Now, is that clear?" Fluttershy asked Pinkie and Twilight.
"Yes. But why did the author censor it?" Pinkie asked.
"What author? What are you even talking about? We're not in a book, Pinkie." Twilight told Pinkie.
"But we are! Don't you guys have fragmented memories?! Fluttershy, can you tell me the name of your pet turtle? And Twilight, can you tell me one thing about your life before the exam for Nutlestia's School for Gifted Unicorns?" Pinkie said, pulling an interrogating table and light out of nowhere.
"Yes. His name was Quiggley." Fluttershy said to herself assuredly.
"Wrong! You don't even have a pet turtle! You have a pet rabbit that's named Angel." Pinkie said in a slightly angered tone of voice.
"Well I remember when Celestia raised the sun during the Summer Sun Celebration." Twilight said with complete confidence.
"...Twilight, how could an acorn raise the sun. You do know that Discord has only been tricking everypony into thinking that, right?!" Pinkie said in a maniacal rage. I think we should all leave now, but let's just keep watching instead.
"OK, so we have fragmented memories. But what does that have to do with being in a story?" Twilight asked.
"It's because the memories are just scenes! They are like chapters in a story, and they always seem to make no sense whatsoever!" Pinkie said. She seems to be floating off of the floor, with random things going on around her. I believe that a proof for two and two equalling five in there somewhere as well. Why is two even spelt like that? It doesn't even make sense! Couldn't we have spelt it toue instead? ...Wait, did she just-? ...Well, this is bad.
"Pinkie, you are starting to go crazy, please stop! ...Wait, is that a-? SHOOT! PINKIE! STOP! YOU CREATED A PINK HOLE! WE DON'T KNOW WHAT IT DOES, NOR DO WE KNOW HOW UNSTABLE IT IS! STOP BEFORE YOU KILL US!" Twilight shouted like a maniac.
And then logic collapsed. Nothing made sense, nor did anything look like anything. We could travel back and forth at will. There could even be more than one of you-ish blobs! ...And then it got bad.
Everything swirled into a giant mass before Pinkie, the only thing that still was in a shape, said, "LEAVE THIS PLACE AT ONCE AND NEVER RETURN. YOU SHOULD NEVER HAVE THOUGHT THAT YOU COULD WIN AGAINST ME. YOU SHALL NEVER HAVE THE THRILL OF READING A BOOK EVER AGAIN, TWILIGHT. AND YOU SHALL NOT TAKE CARE OF ANIMALS EVER AGAIN, FLUTTERSHY. AND IF YOU RETURN, LET ME SAY THIS: THERE ARE THI-!" She was then nudged by her father, Starswirl the Bearded.
"Pinkie, just because I entrusted you with overseeing this world does not mean that you can banish ponies. Also, you should not warp the matter around you either. It is very hard to put it back the way it originally was." Starswirl said as he began returning the world to its natural state.
"But Dad, they don't believe that we are being controlled by an author!" Pinkie whined.
"Well they shouldn't even know about an author unless it's of a book. Now, if you would excuse me I have to go and meet up with Merlin. He isn't getting any older, you know." Starswirl said as he started a spell.
"Fine...I'll see you the next time I mess up, or at Thanksgiving. It depends on which happens first. So, bye for now!" Pinkie said before he flashed away.
And that is the story of Atlantis.