Author's Note

Another request by the same person.

The Scat Contest

It had been a few weeks since Sunset and Twilight's messy camping trip. They were now having a picnic at the park with the other girls, trying to come up with fun ideas for games.

"Here's an idea," said Rainbow Dash. "How about we all have a sleepover, and we sit on a plastic container bottomless, and by the end of the night whoever fills it up with the most pee or poop wins."

"Count us in!" said Sunset and Twilight at the same time. They blushed a little, feeling they had jumped too quickly at this challenge, but it did sound fun after all the bathroom-related activities they had done together.

"And me too!" said Pinkie Pie, who was also looking forward to it.

"Ah love competin' with you," said Applejack, "so ah'm not gonna pass this challenge up. Besides, four of you are already competin'."

"Well... if the rest of you are doing it, I will too," said Fluttershy quietly. "But... can we at least be wearing panties, and pull them down only to... you know?"

"Sure," said Rainbow Dash. Anything for more of her friends to take part in this.

"Count me out," said Rarity. "I'd never partake in something so unladylike!"

"Come on Rares," said Applejack. "The rest of us are doin' it."

"Yeah," said Pinkie Pie. "It'll be really fun!"

"And we won't tell anyone else," said Sunset. "It'll just be between us."

"I don't know..."

"Come on, Rarity," said Rainbow Dash. "Even Fluttershy's competing."

"Well... All right."

"Tonight at my house?"

The girls all agreed to this.

...

They all met up at Rainbow Dash's house, bringing their pajamas, and a spare pair of panties. Rainbow Dash cooked some food that all of them would eat, most of which would make them have to poop really bad, with a glass of prune juice.

She also made beans part of the meal. Knowing what effect they would have, Rainbow Dash decided to make the contest even more fun for her. She sprinkled fart powder all over each and every food item, and in the prune juice.

When Rainbow Dash wasn't looking, Pinkie Pie did the same.

After eating their dinner, and a slice of cake each that Pinkie Pie had brought over, they changed into their pajama shirts, but wearing only their panties on their lower half.

Twilight's pajama shirt was a light blue T-shirt, Sunset's was purple, Rainbow Dash's was a white and red T-shirt, Applejack's was blue with white apples on it, Pinkie Pie's was a blue tank top with balloons on it, Fluttershy's was green with butterflies on it, and Rarity's was pink with diamonds on it, an alternative to her nightgown.

Sunset's panties were black, Twilight and Applejack's were white, Fluttershy's were green, Pinkie Pie's were a darker shade of pink, Rarity's were light blue, and Rainbow Dash's were a tight pair of boyshorts panties that were the same color as the blue section of her hair, and just as thin as the other girls' panties.

Rainbow Dash already had seven large plastic containers, and wrote their names on each one. Then they sat next to them and waited.

"One more thing," said Rainbow Dash. "The loser has to pee through their underwear all over the floor!"

"Oh NOW you tell us," said Rarity.

About ten minutes in, Rainbow Dash let out a loud fart, and chortled. Pinkie Pie giggled, and let a loud fart of her own.

Twilight also farted, giggling loudly, and Sunset did the same.

Applejack unabashedly let out a loud fart, but didn't laugh.

Fluttershy and Rarity each let out an almost-silent fart.

*pssssssshhhhhhhhh*

They farted some more, Twilight, Sunset, Rainbow, and Pinkie having a lot of fun with it.

Eventually, Rarity could no longer keep her farts silent.

FFFFFFFRRRRRRT!

She blushed. "Excuse me, that was so unladylike..."

"Don't feel ashamed, Rarity," said Rainbow Dash, lifting her leg and farting loudly again. "We're all farting too so you might as well have fun with it!"

Rarity sighed and farted again.

Fluttershy was holding it in for some time, and tried to fart silently again, but instead let out a loud, deep-pitched, five-second fart, and blushed beet red.

Twilight and Sunset put their butts together, both farting loudly, and Rainbow Dash and Pinkie Pie did the same.

Even with the windows open the room was starting to smell, but they knew it would only get smellier.

"Seriously, even those beans shouldn't be makin' us fart THIS much!" said Applejack after a loud three-second fart.

"I may have spiked everything we ate with fart powder," said Pinkie, giggling as she farted again.

"No, I did," said Rainbow Dash.

"I'm pretty sure I did."

"Well I did it too, so that means..."

BBBBRRRAAAAAAAAAP!

"We both did!" said Pinkie Pie, who proceeded to laugh at Rainbow Dash's boisterous six-second fart, involuntarily farting a few more timed.

"Things are going to get even gassier than I imagined!" said Rainbow.

"Well I don't mind," said Sunset, farting loudly again.

Twilight giggled, and let out a few wet farts.

Rarity and Fluttershy were farting as much as the others, and just as loud.

Over the next half hour, their farts became wetter, and their panties, which smelled of farts already, were starting to feel dirty.

Twilight let out another wet fart.

PPPPPFFFFFRRRRRT!

"I think I might have soiled myself..." Twilight blushed and giggled nervously.

She felt her butt, then dumped her mess into her container. Of course her white panties were still soiled, but she didn't mind.

"It's that time," said Rainbow Dash, farting loudly.

Sunset pulled down her panties and sat on the plastic container as though it was a toilet, releasing several logs into the container. She giggled at how dirty her panties felt when she pulled them up.

"Uhhhh..." Rarity hesitated, and pulled her panties down, letting some hyperscat cascade out of her rear and into her container. She cringed as she pulled her underwear back above her dirty butt.

"Here we go," said Rainbow Dash, pulling down her boyshorts and noisily releasing the contents of her bowels into the container.

Fluttershy was feeling the pressure as well, her last fart being so wet she nearly soiled herself. She was not looking forward to pulling down her panties and doing her business in front of the others. She decided she'd wait for someone else.

As soon as Applejack pulled her panties down, Fluttershy did the same. They sat on their containers and released a brown mess into the containers.

Just as they were done, Pinkie pulled her underwear down and did the same thing very noisily, giggling the entire time.

For the next half hour, it was just farts. Then, the urge to poop hit again.

Twilight and Sunset went first, and Twilight was surprised when a lot of hyperscat made its way out of her.

Then Rainbow Dash, then Applejack and Pinkie Pie.

Rarity let out nearly as much hyperscat as Twilight, and couldn't deny it felt good. She pulled her underwear back up, and then she farted loudly and accidentally soiled herself a little. She blushed profusely, but didn't say anything.

"That sounded wet," said Rainbow Dash. "Careful you don't make a mess in your-"

PPPPPFFFFFFFFFFT!

Rainbow blushed lightly as she sharted her boyshorts. She giggled nervously.

Rarity didn't comment, too concerned with hiding her own accident.

Fluttershy wished she had taken her turn with Rarity. She didn't want to be the only one to pull down her panties, and she really needed to go.

Then she let out a boisterous wet fart, and made a mess in her underwear. She blushed beet red.

"Maybe I wasn't clear," said Rainbow Dash. "You have to get the poop into the container."

Blushing, Fluttershy dumped her mess into the container. The other girls averted their eyes at least. Her green panties still had a brown spot on the butt, so she sat in her soiled panties, feeling ashamed.

About twenty minutes later, they all needed to pee.

"Remember," said Rainbow Dash, "this contest includes pee too!" She sat on her container and peed through her blue boyshorts into it. She farted in the middle of it.

"Rainbow Dash, are you-" Rarity began.

Pinkie sat on her container and also started peeing through her pink panties, looking like she was enjoying it. Then she let out a loud fart and soiled her panties a little. Once she was done peeing she shook the single log of poop out of her underwear and into her container.

Then Sunset and Twilight peed through their panties into their containers, giggling to each other. The other girls had no idea how many times they had wet themselves for fun.

"Oh, fine." Rarity sat on her container and started wetting herself.

Applejack did the same. Fluttershy was already sitting on her container, hoping to pull down her panties quickly if the urge hit again. But, seeing all the other girls pee their panties, it was surprisingly easy for Fluttershy to do the same. She almost even enjoyed the feeling, though blushing lightly at the fact that she was wetting herself in front of all her friends.

Ten minutes later, the third wave hit.

Sunset felt it come immediately, and didn't quite get her underwear down in time. Most of her mess went into her container, and what had gotten into her panties soon followed.

Rarity remembered to dump the mess in her panties into the container before she let out the next wave of hyperscat.

At the end of the fourth wave, with many wet farts in-between (during which Rainbow and Twilight accidentally soiled themselves slightly again), they were done.

"Now, let's see..." said Rainbow Dash, examining the buckets. "Wow, Twilight, yours is overflowing!"

Twilight giggled. It was obvious she won.

"And... Rarity, looks like you get second!"

Rarity's container was full to the top, but not overflowing like Twilight's. She felt embarrassed at how much she how much she went, but at least she didn't win or lose - either would be more humiliating for her.

Rainbow sorted out the other five containers, lining them up by how much was in there.

"So, Sunset, you get third place. Then Pinkie Pie. Then Fluttershy, and Applejack. And... oh come on! I got last? How could I lose at my own contest?"

"You know what you gotta do now, right?" said Applejack.

Rainbow drank a few glasses of water. Then, when the urge hit, Rainbow peed herself, letting the wetness flow down her legs and form a puddle at her feet. Sunset, Twilight, and Pinkie giggled.

Once that was done, they each took a long shower and changed into their new panties and their pajama pants (their shirts had remained clean for the entire contest).