Part 1:

Rainbow Dash was flying around Ponyville, warming up her muscles before finally accelerating at her full capability. After doing a series of flip in the air she finally landed in front of the clock tower. Then she looked at the time.

“Buck!”

She have promised Pinkie Pie to help her with something at three. And it was past fifteen minutes!

She charged at full speed to Sugar Cube Corner and started knocking at the door.

“Hey Pinkie! It’s me! Open up”

Pinkie Pie opened the door for her friend with a huge smile. “Well, hello there Dashie! Oh wow, for a tiny moment I thought you weren’t coming!”

She smiled as Rainbow shrugged apologetically. “Yeah, I’m sorry Pinkie. I was busy practicing my moves, and I kinda lost the track of time. Anyway, what do you need me for? Is it a prank? Please tell me is a prank! Who are we pranking? Twilight… or maybe…”

“Nope!” said Pinkie heading to the kitchen. “Today we are going to maaaaaaaaake… cupcakes! Yummy, delicious cupcakes!

Rainbow Dash groaned. “Seriously Pinkie? You know I suck at baking! Wouldn’t you prefer to get Applejack’s help instead? I can go get her!”

Pinkie shook her head as she offered a cupcake to Rainbow Dash.

“No, no! it has to be you Dashie. Only you can help me to make sure my cupcakes are as delicious and super duper especial as usual. Don’t worry, you leave all the baking to me. You sit there and relax.”

Rainbow sat on a chair as she accepted the cupcake. “I see, you want me to try them for you. okay, I can do that! You know what, I can have a snack after all that exercise. Thanks for the meal!”

She ate the cupcake as she looked at Pinkie, who was smiling. It was only her, or there was something different about her smile. It was wider as usual. Even sinister. Or maybe not. Rainbow was only imagining things.

“Hey Pinkie, is just me or the whole room is spinning?”

Pinkie’s smile grew wider. “Sweet dreams my little Dashie…”

Last thing Rainbow saw was her friends expression. Her unnerving smile and dilated pupils staring right at her. And then, everything went black.

…

Rainbow Dash opened her eyes.

“Mmmmhm… where I am?”

She started to look around. The whole room was dark except for a sign painted with bright red letters. Was it paint… or something else?

LIFE IS A PARTY

Rainbow tried to move but her four legs were firmly held by steel shackles. Rainbow tried to struggle but it was pointless.

“Hey Pinkie Pie! Very funny prank, you got me! Now let me go and let’s call it a day!”

No response.

“Oh, I see! Everyone is here! Ahahaha, great job guys. Can we stop this nonsense now?” hey!”

Rainbow Dash heard some hoofsteps right behind her. She tried to turn around, but she couldn’t move that much thanks to the shackles.

“Pinkie?”

“Good evening, my little Dashie…”

She laughed hysterically as she entered Dash’s vision field. It was pitch black, but Rainbow could notice she was wearing a strange outfit.

“What’s the meaning of this, Pinkie?”

She began to struggle again. But much to Pinkie’s surprise, she didn’t sound scare anymore. She seemed pissed.

“This is your first and only warning Pinkie. Release me on this instant or you are going to regret it!”

Pinkie smiled as she slowly walked to the light switch. “Well, look at that response! So courageous, worthy of the legendary Rainbow Dash!”

Pinkie turned the lights on, and Rainbow gasped in surprise.

They were in a white empty room, with blood staining the walls. Fragments of bones and even some plastic bags in a corner. It wasn’t hard to imagine what was inside the bags.

But the most unsettling sight was Pinkie herself. She was wearing a coat made of Cutie Marks from a lot of different ponies including the parents of one of their closest friends and some acquaintances who supposedly left town. And on top of that, Pinkie was wearing a necklace made of unicorn horns and pegesi wings.

Rainbow Dash glared at Pinkie, angrier than ever. “You are so gonna regret this Pinkie Pie! I swear to Faust!”

Pinkie Pie laughed.

“Ahahahahahahaha! Come on Dashie, don’t you realize the position you’re in?!”

“The pony who doesn’t understand her position is you! I always knew you were kind of silly, but not plain stupid.”

Pinkie Pie walked toward the stretcher she held Dash on.

“When are you going to get a clue? Do you know what I do here?”

“I would say this is just another one of your jokes and all those things are props, but I recognize the smell of rotten flesh anywhere. So yes, I have a very good idea of what you do here.”

That made Pinkie hesitate. She was right, most of her victims automatically threw up as soon as they realized of the smell. But not Rainbow Dash.

“You are more interesting than I thought, Dashie. I am going to enjoy this more than I originally thought.”

Rainbow Dash looked at her right to the eye.

“Go on, I dare you!”

Pinkie Pie took a couple of cables from behind the stretcher and connected them.

“Let’s see how brave you are after I do this!”

She turned on the power, making a powerful electric current run through the stretcher

She screamed in pain, as Pinkie laughed. Finally, she disconnected the power and turned to Dash.

Rainbow’s body still shacked due to the electricity running through her body. But her expression was firm.

This was starting to get under Pinkie’s nerves but luckily it would be over soon. She slowly took a scalpel from her mane and stabbed Rainbow Dash’s Cutie Mark with it.

Rainbow cried in pain as Pinkie used the scalpel to make a circle around her Cutie Mark.

“You know? When you’re scared your whole body tenses making your flesh hard and spoils the taste. But an electric shock would make it tender again.”

Rainbow Dash grinded her teeth. “Who says I’m scared?”

Pinkie’s eye twitched as she ripped off her Cutie Mark, taking a good chunk of flesh with it.

Rainbow Dash screamed in pain much for Pinkie’s delight. “Ahahahahaha! So you finally get it? This is what is going to happen to you!”

Pinkie chewed a piece of the meat and looked at Rainbow.

“Where are my manners? Take some!”

And she forced the piece of meat on Dash’s mouth. Rainbow Dash threw up.

“You are bucking disgusting you know?”

Pinkie laughed. “Come on! Is not like you haven’t had my cupcakes before!”

Rainbow Dash grinded her teeth. “Unbelievable. I know I am a monster, but despite being what I am and all the things I’ve done I thought I wouldn’t become a cannibal. But thanks to you I have another sin to add to my list. I am going to remember this, better prepare yourself.”

Pinkie Pie was getting more frustrated with the situation. Why wasn’t she scared? What was Rainbow Dash’s problem?

“How long are you going to evade reality? I am about to bake you into a cupcake! A CUPCAKE!”

Rainbow Dash didn’t react and keep staring at her.

Finally Pinkie decided she had enough of Rainbow Dash’s glare and aimed the scalpel to her eye.

Rainbow smirked and slapped the scalpel out of Pinkie’s hoof with her wing and took it.

Before Pinkie could process what just happened, Rainbow Dash used her wing to stab her eye with the scalpel.

Pinkie stepped backwards as she screamed in pain.

“Aaaaaaaaaahrgggg!”

Pinkie was in shock. How could she? But then she started laughing.

“Ahahahhahaha! I knew you were full of surprises Dashie, but this takes it to a whole new level! I may need to keep an eye open for pegasus wings from now on!”

Rainbow grinned.

“This is just the beginning.”

As Pinkie recovered from her surprise attack, Rainbow dislocated her own backhooves with a quick move and, once they were in an unnatural awkward position, she released them from the shackles.

And then put them back on their original position with another move of her hip.

“You have no idea the endurance training I had to go to get when I started working at the factory. This is nothing!”

Pinkie removed the scalpel from her eye and turned to Rainbow Dash.

“I see…”

“Do you get it now? You didn’t catch me. You are trapped here with me.”

“Is that so?”

Pinkie Pie rushed to stab Rainbow Dash with her scalpel, but she was received with a kick to the jaw by her friend and she fell.

Rainbow Dash then pushed with her back hooves and her body to finally break free from the shackles.

Pinkie’s jaw dropped.

“How you do that? How are you that strong?”

“I am not, I just realized the screws you used are rusty. How many ponies have you killed here? Blood spills and make things rusty. Try to give some basic maintenance to your tools from time to time.”

Pinkie grinned. “Thank you for the advice.”

Rainbow Dash was limping from the leg Pinkie took the chunk from, but still she advanced toward Pinkie. “I warned you didn’t I? You were going to regret this.”

Pinkie stood up to face Dash. “Oh well, the hunter became the pray. Sometimes it happens. Is just business.”

With that Pinkie jumped over Rainbow, and the two of them rolled on the floor. Rainbow Dash tried to break free from Pinkie. Pinkie tried to stab her on the eye to make things even, but Rainbow put her hoof right on time.

She groaned in pain at the deep cut, but continued to struggle and finally managed to kick Pinkie away and started to look around looking for an exit.

“Where do you think you’re going Dashie?” asked Pinkie taking a huge metal stake from behind the stretcher. “We’re not done having fun!”

Rainbow looked at one of the plastic bags and took threw it at Pinkie just in time when she prepared to stab her. The bag ripped open spreading all of its content on the floor.

They were bones just as Rainbow suspected.

But then one of the bones called her attention. It was a skull, but not a pony skull.

“Wait a second, Gilda?”

“Oh yes, she was quite fun to play with. Not as fun as you but still.”

Rainbow Dash’s eye twitched. “Okay, now I’m pissed.”

Pinkie Pie recovered and jumped over to stab Rainbow Dash, but she moved on time and all she did was a small cut on her cheek. Rainbow Dash then took Gilda’s skull and smashed on Pinkie’s head. The beak made a small cut on her forehead.

Then Rainbow took Pinkie’s stake and stabbed her opponent on the flank.

Pinkie screamed in pain, but her screams of pain slowly turned into a hysterical laughter.

“Ahahahahaha! I bite a cupcake too big for me to finish. It was fun as it lasted.”

Rainbow put the metal stake over Pinkie’s chest. “You know what the worse part is? I’m really going to miss you Pinkie Pie. It’s a shame you are an earth pony. In Cloudsdale we have an especial way to deal with ponies like you and me.”

“Oh, and what is it?”

“We all work at the Rainbow Factory.”

With that she put all of her weight on the stake, stabbing Pinkie Pie on the heart. Her last smile was forever frozen on her face in a nightmarish grin.

Rainbow Dash looked down at her.

“Stop laughing!”

And she continued stabbing her face until there was nothing but a red paste.

It had been a while since she killed somepony with her own hooves. She usually used the Super Speedy Filly Squeezy 600, but sometimes one of the failures she dealt with escaped and gave her no choice but killing them before it was too late.

“See you in hell. One of these days.”

…

It had been two weeks since that incident with Pinkie Pie, and a fully recovered Rainbow Dash was back at Factory.

But she was called at her boss’ office.

“Hey how are your wounds?” asked her boss, Doctor Atmosphere, from behind his desk.

“Nothing I can’t handle. These two weeks were all I needed to heal and to cover it all.”

Doctor Atmosphere nodded.

“I see. Those who operate in the shadows don’t cross paths too often but when we do, everything reduces to who is the strongest, right?”

Dash nodded.

Then Doctor Atmosphere gave her a list.

“Anyway this is not what I called you for, but this. The exam is tomorrow. Are you ready to receive the new wave of failures?”

Rainbow grinned. “I am always ready.”

“Wanna make a bet? Most of us think that this kid, Aurora Down, would be joining us at the Factory.”

“No, I’m good. If I have to bet, I would bet my honorary sister Scootaloo would graduate with honors.”

With that she exited the office. She was looking forward to the next day. One of the new recruits may escape and gave her a few hours of fun.

Author's Note

And this is it, part one of this funny slasher crossover ready to celebrate Spooky Season. I hope you liked it and well, I’ll see you in part two.

Next chapter would be centered around Rainbow Factory with some elements from Cupcakes.

Read ya’ later!!