It came from the Everfree. That light, bubbly laughter that only she had ever heard. The were-pony crept toward the sound, following it to a small clearing bathed in moonlight, dimly lit by a small campfire. There she spotted her prey: yellow coat, pink mane, bunny ears. The peg- no, bunny danced around the flames with reckless abandon, so different than normal. With a small growl, the were-pony pounced on the usually timid bunny, pinning her flat on her back.
“Rainbow! You don’t have to stay in character away from the foals, you know!”, the pegasus scolded.
“But it’s so much more fun to play with you like this!”, she wagged her wolf tail.
“You shouldn’t play with your food, then.”, Fluttershy gestured to the rather sharp fake teeth that were uncomfortably close.
“Who said I was gonna eat ya?”
“Well what are you planning to do with me, then?”, a blush spread over yellow cheeks.
“I have a few ideas.”, she gave a ‘wolfish’ grin and leaned closer.
“Alright you two, play time is over. We have foals to entertain, and I’d rather not have to show them my book on cross-species breeding schematics.”, an unamused, purple vampire trotted from the woods.
“Ah definitely don’t want mah sister asking questions I can’t answer.”, a clanking sound announced the presence of an orange mare in armor.
“Oh darling, can you try not to make such hideous noises?”
“Yer tha one who stuck me in this tin can! Why do Ah have to be in this costume anyway?”, she protested.
“What is a princess without her champion?”, the purple-maned pony indicated her sparkling pink dress and silver tiara.
“What is she, indeed?”, a white alicorn materialized behind Twilight.
“Ack! Princess!”, the black-clad unicorn spun around and bowed in record time.
“Hey Celly! Where’s your costume?”, a bouncing, pink mummy appeared beside the princess.
“What scare I could get out of a costume would top the reactions my student has at the mere sight of me?”, her face broke into a grin.
“True sister. Maybe I should dress as you next Nightmare Night.”, the dark alicorn stepped out of the shadows, gaining another yelp from the purple pony.
“Geez, is that out of nowhere thing limited to alicorns, or do you do that to startle Twilight?”, Rainbow peered at the sisters.
“Quit talking about me!”, purple magic zipped the pegasus’ mouth shut.
“Um, if I may ask, why are you two here in Ponyville? Don’t you have a Nightmare Night celebration in Canterlot?”, Fluttershy asked as she clumsily unzipped the blue mouth.
“Stuck up royals who only celebrate for social status? Pass.”, Luna waved a hoof.
“Yes, I’d much rather celebrate the holiday with my faithful student. Too bad you’re not actually a vampire, I’d get to tease you for all eternity.”, the white pony sidled up to her student and draped a wing over her.
“Of course, you’d have to share.”, Luna smirked and raised an eyebrow, and soon the faux vampire was as red as the fake blood on her lips.
“S-stop it! T-that’s n-not fair!”, she stuttered.
“What’s wrong with Twilight, sis?”, a small country accent piped up from a superhero.
“She looks like she’s going to explode!”, an overly excited Royal Guard laughed, fluttering her orange wings.
“Something like that, squirt.”, the were-pony chuckled.
The small group of foals were standing in the clearing, having been led there by Zecora. The confused looks on their faces were enough to spin the older mares into a fit of hysteric giggles.
“Looks like you’re gonna have to get that cross-species book out anyway.”
(And yet another escapade ends with Twilight in an embarrassing situation)
Norse Pony’s comments: The choices of costumes were great, and clearly your shipping goggles are firmly installed. A costumed Nightmare Night gathering in the woods sounds like a lot of fun, especially with everypony there.