Twilight teleported into Canterlot Castle, a look of worry spread across her face. Quickly, she navigated the snaking halls of the palace, making her way to the throne room.
As Twilight entered the grand throne room, she gasped. "It did happen," she whispered, "that one accident... it really did do it." All about the room, Luna was chasing a tiny hyperactive alicorn filly, followed by a barrage of guards who seemed to be\ doing everything that they could to keep the filly Celestia from destroying the place. Upon Twilight's, they all stopped and glared. It was as if time itself had suddenly frozen in it's tracks. The filly princess also stopped, but only for a short moment. Immediately, she went back to doing whatever it was she was doing. In this particular case, it was chewing her mane while doing backflips. Luna immediately began a ranting shout. "YOU!" she yelled, "TWILIGHT, YOU... YOU MISTAKE...ER, LOOK AT WHAT YOU DID TO MY SISTER!"
Across the room, the tiny alicorn shoved aside large pillar, which upon losing it's center of gravity to the princess, toppled over towards a large majority of the guards. Luckily, ponies are kinda squishy in a way, so the guards were perfectly fine, though albeit stuck.
Twilight hoofed the ground. "Oopsies?" was all she could muster up. Her head hung low, though under all that, Luna could tell that she seemed to be enjoying what she was seeing behind her.
A harsh glare shot from Luna's highest ranked guard. "Twilight Sparkle, Princess of Friendship," he began, "I see quite well that you appear to enjoy the chaos. Are you affiliated with the one known as Discord?"
Twilight winced as a large explosion sent guards and bits of the pillar flying. "It was only an accident... I misfired a spell when Pinkie surprised me..."
Luna spoke as Celestia blasted away at one of the thrones. "Indeed, Twilight. And that misfire somehow managed to hit Celestia on the face, through the window, just as she was eating a slice of cake." She turned to watch the filly destroy several more valuable objects around the room. "And now, not only is Celestia a filly again, but due to the cake that she ate moments before, she's even more hyperactive than we could ever fear."
Twilight sheepishly grinned. "Oh, sorry me. Sorry, sorry, so-"
She was immediately cut off by a tiny white hoof, which was attached to the tiny white alicorn hovering beside her. "SHHH!" whispered Celestia, "The cake monster is nearby!"
Twilight swat the hoof from her mouth. "And you... you taste like cake too, Celestia."
Celestia waved both of her front hooves in a sweet little show of adorable pride. "I know," she said happily, "I was helping in the kitchen earlier!"
Chef Ramzee's chest heaved as he steadied himself on a portion of the counter. All about the kitchen was destruction. That is, destruction in the form of magic-infused cake batter. Just moments earlier, a savage demon apparently spawned from Tartarus itself rose from the mixing bowl that he had lent to Celestia for the purpose of tasting the batter. Just moments after the initial rising of whatever the buck the horrid thing was, it promptly rampaged through the entire kitchen chambers, feasting itself on anything that would normally be used to make cake. For all he knew, that monster could be anywhere in the castle now.
Luna facehoofed. "Tia," she began, "you do realize that the only way that you've helped so far is helping to destroy this castle. Perhaps you should also take into consideration that the 'Cake Monster' that you've been running from has been terrifying the palace staff for the past half an hour. I recommend that you stop this foalishness immediately, sister."
Celestia sat on her haunches and pouted. "Aww, you're no fun, Lulu," she said, "all you like to do all day is sit in front of the big glowy flat thingy and press buttons on that board thingy while shouting mean things at ponies inside the flat thingy."
Luna groaned. "Tia," she began, "for your information, that 'big glowy flat thingy' is my TV, and the 'board thingy' is the controller for my game console. Those ponies inside the 'flat thingy' are just characters in the game I was playing."
Celestia continued her little tantrum. "And all you like to do all night is stare straight up, Lulu. Is there a problem with your neck?"
Luna frantically waved her hooves around in self defense as the little terror of a filly tackled her with the full force of an Earth Pony. "Lemme get a look, Lulu!" She wailed, "I wanna play doctor!"
Twilight sat and watched the action from a distance-- the other side of the room.
Suddenly, a familiar voice began echoing throughout the throne room. "So, kid, do ya wanna play a game???"
The filly princess' eyes lit up. "Game?" she said, "I like games!" she took off, and began flying about the room. "What's the game?"
Discord abruptly appeared in front of Luna. "Well well," he said, "what do we have here?" Just as Celestia few by, he plucked her out of the air, and flicked her muzzle.
Luna waved aside Discord. "Nothing, just a certain filly that came from the result of a certain Twilight Sparkle that I know..."
Discord jokingly shot a strangely disturbing stare at Twilight. "Ooh, so we have a new mother here, eh?"
Twilight paused to let the words soak in. Finally, she began sputtering. "I...but...I uh...it's...just... NO!"
Celestia watched as Twilight's face slowly began twisting into the classic 'Insane Twilight' mode that had been plastered across her face that one time. "Lulu?" she whispered, "I'm scared."
Luna pat her filly sister on the head. "Nothing to worry about, Tia. I'll get rid of that scary pony for you." She grinned maniacally as she charged her horn, and in a moment, Twilight found herself flying away in a box labeled, "Send to: Insane Asylum". She then set her sister back down on the floor, but immediately snatched her back up again upon hearing the terrifying growl of whatever demon Celestia had risen from Tartarus.
"AHH!" Celestia giggled, "IT'S THE CAKE MONSTER!"
She began running in little circles about the room, apparently pretending to find shelter. Suddenly, the throne room doors burst open, revealing the ugliest, slimiest, biggest, and above all, sweetest of any monster that Luna had ever seen in her years of life. Possibly even before life even.
At the sight of the monster, Discord immediately teleported himself into a small makeshift loft on the ceiling, all prepared to watch the face-off with a bucket of cornpop beside him.
Luna was left as the only pony standing against the monster, except for the bubbly filly that was ravaging her mane.
"Sparkly," Celestia giggled as she tied more strands of her sister's mane, "It's like the night sky..."
An ear-shattering roar frightened the two princesses back to the hulking mass of sugar and flour growling in the center of the room.