Chapter 1
The transformed Luna laughed evilly as her wings fully opened.
"Everyone will bow before me! The mighty Nightmare Moon!"
Principal Celestia was a little late getting to CHS the next morning, due to breakfast not entirely agreeing with her.
"Just a little Pepto-Bismol should do the trick," she said, going to unlock the door.
When she went in, for some reason, she felt more queasy for some reason.
I may need to see if Luna can take my place while I run to Subway to get something for us.
She turned on the light switch as she approached the door to her office, but no immediate feedback, "Strange."
Every door around her slammed shut as a dark-midnight-blue glow illuminated the hallways, "Uh..."
The feeling grew with each passing second until...
"Everyone will bow before me!!" something said from a distance.
"Luna?" Celestia said, taking her phone out and attempting to call her sister, but she was instead greeted with a brief no-service message before the phone shut off, "Luna, are you there?" she began to walk down the hallways.
"It is only I, Nightmare Moon," a figure said, stepping out of a shadowy area.
Celestia panicked and froze, with the exception of taking a few steps back, "L... L..."
"That is correct, sister," Nightmare Moon said, "If you wish to run, I will most graciously give you a few seconds for a head start."
Run, Celestia you idiot!
She didn't take NO time in running, even trying every third or fourth door she saw after she was sure she was out of her sister's Nightmare Moon's sight.
"No!" she said, upon finding that even her office was locked.
"Let me explain myself," the nightmare said, its metallic shoes audible with every step.
Celestia turned around, then ran backward into her door.
Seconds turned to minutes turned to hours as she continually failed to process what was going on, other than it would be a dark ending for her.
~~~Later~~~
As the students and faculty made their way to the school, they all noticed it was still twilight, and not full-on morning. Rather late Sunrises were to be expected, considering how far north they were and what time of year it was.
Nobody seemed to notice the faint, blue glow around the school, though.
Then again, they were either talking to their friends, watching videos, sitting in their cars and running the heaters for a few minutes (for those who drove. Some were even making a nice, big plume of smoke at the same time), and whatever else the students of Canterlot High did before the first bell.
"I can understand why nobody wanted to give steel to the East Germans after seeing this."
"Why?"
"Who wants to give it to people who'd make a car that is quite bad?"
"Say it!"
"The car is made of cotton, weighs three ounces, and has exactly two more horsepower than an old lawnmower. And it should be here from Hungary by next week. I hope there aren't too many holes in the engine."
"Oh God!"
"Sunset, Shining is okay with you taking his room over the weekend. He says he'll sleep on the couch so you can have his bed."
"It's alright. As nice as that sounds, it's his room. I can sleep on the sofa."
"No, we insist."
"I don't have a way out of this, do I?"
"Nope. You did save the school from... me?"
"Actually, it was all of us."
"Oh, don't be so modest, Darling! If it hadn't been for you, Heaven knows where we'd all be!"
"Flash, I have the designs for what I believe to be the perfect amp for your guitar!"
"Thanks, Microchips, but I-"
Because nobody had been paying attention to the glow, they were in no way prepared for when the windows blew out of the school, the force being enough to knock everyone back, along with a few having the misfortune of being thrown through the portal by the force of the blast.
"Jesus Christ!"
As the students got up, they all noticed the excessive amount of glass shards that used to be the windows to vehicles and the school.
"Guys," Sunset said, "This is our cue to do something."
They all ran into the building to find it a complete wreck.
"Where's the cacklin' comin' from?" Applejack asked as they went down the messy halls.
Sunset, not too long after, froze in her tracks as she found Principal Celestia bound and gagged on the floor.
"Principal Celestia!" Sunset said degagging her, "What happened!?"
"Luna..." she replied, hoarsely.
"Maybe this'll help!" Pinkie said, giving a bottle of water to their principal, who guzzled it down in a matter of seconds.
"Gah... It's Luna... but not Luna..." she said, panting.
"What do you mean?" Sunset said as she freed the principal's hands and feet.
"Something about... about Nightmare Moon. I... my world just..."
"The Mare in the Moon!? HERE!?"
"I... I guess."
"You get to somewhere safe!" Sunset said frantically, "I remember a story about this in Equestria! If I'm right..." Sunset finished her sentence by inhaling sharply with her mouth open.
Principal Celestia bolted into a closet at that, jamming the door shut.
"Well, well, well," Nightmare Moon said, "Look who thinks she can save the day," the "sunrise" began to noticeably give way to the night again.
"If the elements can defeat you in Equestria, they can beat you here, too!" Sunset said as the elements began to ascend.
"Laughter!" Pinkie ponied up.
"Kindness!" Fluttershy ponied up.
"Generosity!" Rarity ponied up.
"Honesty!" Applejack ponied up.
"Loyalty!" Rainbow ponied up.
"Magic!" Twilight ponied up.
"And Friendship!" Sunset ponied up.
"How cute," Nightmare Moon said as she flew up to their level, "But we're not in Magical Pony Land!"
The nightmare summoned a ball of magic to knock the element bearers out of the air, but on Pinkie's cue...
"LIGHT 'EM UP, LADIES!!"
They sent a rainbow beam at Nightmare Moon, turning her back into Vice-Principal Luna, allowing the Sun to begin to rise again.
"Mmm," Vice-Principal Luna groaned as the bearers descended, "What... happened?" she looked around.
"That's what we want to know, too," Sunset said as Twilight went to get Principal Celestia.
"I remember seeing a flask of green liquid in one of the science labs, so I drank it, probably because I was thirsty. After that, everything turned fuzzy, then nothing."
"Ooohhh," Pinkie said, "That's where I left my drink!" they all turned to her with mixed expressions, none particuarly good, "What? I didn't know this would happen!"
"Thank heavens you didn't drink... that," Rarity said, "Knowing you, a lot worse could've happened."
"I'm giving PartyBakeryRecipes.com a bad review!" she replied, her expression changing to... her equivalent of "angry", "They deserve it!"