Twilight started to walk to the throne room. She recently discovered that Pinkie is trying to experiment with giving cupcakes life, and decided that she should talk to the princess about it. She still doesn't understand anything of what happened last week, nor does she necessarily want to either. After all, she is just a student of an acorn.
Once she got to the throne room she was greeted by an imposing white figure that was talking to some guards, but didn't care whatsoever. What intrigued was when she found that Nutlestia was not resting on the throne. She decided that she ask around when she heard her name get called...and that's when things started getting normal.
"Twilight!" The white figure called. "Finally, a recognizable face!"
"...Who are you?" The lavender mare asked the creature, followed by more questions, being her usual inquisitive self. "And what are you as well? I've never seen a pony with wings and a horn. Wait...are you, by any chance, a new crossbreed that was recently created by some revolutionists trying to overthrow the Princess?"
"Um...Princess Celestia, an alicorn, and...no? And why don't you recognize me? And why are you treating me like I'm something to be studied?" The Princess questioned her student/protégé/whatever she is right now.
"OK. One, I don't recognize you because I don't know you. Two, I am treating you like that because I have never seen nor heard of an alicorn before. Also, the only Princess Celestia here is a nut, so why do you claim to be her...and why do you seem to know me?" The mare replied.
Celestia looked around nervously before saying, "I don't know what you're talking about.... Also, why and how is a nut, and I just want to clarify that you don't mean a lunatic, but an actual nut, ruling a kingdom?" She then paused before continuing, "And how could you have never heard of an alicorn before?"
Now it was Twilight's turn for all of the major answers. And so she replied with, "Yes you do. You called me by my name when this conversation started." At this point Twilight began to walk around the Princess in a way that suggested she was interrogating her. "Also, it's a long story about trees and Star-Swirl the Bearded. You can find it in the library if you want. As to your other question, I do not know. Somehow they were told to be our rulers and we accepted it.... And I haven't heard of an alicorn before because they don't exist in this world. I am starting to get the impression that you're from a different world though...which would explain how you know more about me than I do of you."
The ivory alicorn just stood there, dumbfounded by her theory. "But that would mean that I'm not supposed to be here! How am I supposed to get back!"
"Ask the Doctor," the mare said, "he knows more about travel between dimensions than I do. He even has a box that's called the 'Time and Relative Dimensions in Space' or the 'TARDIS' for short. He might be able to help you. Meanwhile I have to worry about zombie cupcakes being created." At that Twilight started to walk away.
"There's a simple solution to that! The Pinkie in my world already did that! We stopped her by telling her about the guilt of eating something that doesn't want to be eaten! She was snapped right out of the idea!" Yelled the white alicorn, trying to tell the unicorn before it was too late. After that she went to try and find the Doctor.
CELESTIA GETS HOME SAFELY, NOW BACK TO TWILIGHT AND THE IMPENDING DOOM OF THE ZOMBIE CUPCAKES!
(Unrelated note: I am writing this part about a month or so after the first part, so this is going to be a rough transition.)
Twilight walked back into the kitchen, and, having not heard the other Princess' words, she started to attempt to talk Pinkie out of making zombie cupcakes. When she walked in, she noticed that a body lay on the ground, with mutant cupcakes dancing upon it. Well, at least everything was perfectly normal, minus the fact that there was a giant hole in the wall.
Wait, there was a giant hole in the wall! "Well, Pinkie is unconscious, there's most likely a giant mutated cupcake on the loose, and I have to create a new princess. Meh, I'll let the townsfolk deal with it." She took another look outside of the new window, and then said to herself, "After all, it is heading for Blueblood's castle, so nothing too bad can happen." With that she retired to her room.
Then Pinkie began to wake, or, what was once Pinkie. By now the cupcakes had invaded her body and she was under their control. She can only be freed by banana nut muffins now, and Derpy has stolen all of them.
Equestria is on the verge of apocalypse, Blueblood is under attack, the Doctor is trapped in another world, and the Elements of Harmony aren't even known. You know what this calls for! A party! Pinkie, stop writing about mutant cupcakes. NEVER! ...I do still have one pony that can save Equestria, and unless you stop writing with your mind, I will unleash them upon your cupcake army. OK, sorry about that, Pinkie is still living with me, so she occasionally messes with my stories.
Anyway, back to the story! 'Twas the night before Christmas.... Wait, wrong story. While Twilight was sleeping, she was not aware of how there was an apocalypse happening to her city. She slept peacefully, completely unaware. She dreamt of her future, the chance of visiting other worlds, and the hope that her world might actually be normal for once. What she didn't know, however, is that she was subconsciously learning magic as well. And she would need that magic, too, for it was ponykind's only way of survival against the new threat.