Author's Notes:

So, I may add more chapters, but to the end this time, with the "epilogue" chapter just being a jump to the future. Also I know one of my friends will love what I do with Sunny Flare.

Rainbow Dash, Rarity, Pinkie Pie, Fluttershy, Applejack, Sunset Shimmer, Twilight Sparkle, and Wallflower Blush were hanging out at the park on Saturday, for the weather was very nice.

Pinkie Pie had not taken her morning pee, and she had drank lots of soda last night and this morning. So, she was in desperate need of a bathroom.

"I gotta go pee SO BAD!" She looked at Sunset, trying her hardest to smirk in her desperate state.

"Sorry, this isn't one of those times," said Sunset.

Pinkie turned toward Rainbow Dash, who shrugged.

"Bummer." Pinkie ran toward the outhouse.

"Wait!" said Fluttershy.

Pinkie turned around, holding herself and pee dancing.

Fluttershy looked nervous, but she wanted Pinkie to have her fun. She let out a silent fart. Pinkie didn't hear it. Fluttershy blushed. It seemed she was incapable of farting audibly.

"Um... never mind."

Pinkie zipped off at top speed. On her way to the outhouse, she bumped into Sonata Dusk. Both silly girls fell on their butts.

Pinkie felt a jolt in her bladder, but stayed dry. Sonata stood up, and Pinkie could see the crotch of her skirt was wet. She must have wet herself laughing at farts earlier today. Pinkie looked behind her and saw Adagio Dazzle, Aria Blaze, Lightning Dust, Indigo Zap, and a girl with blue skin and fairly short purple hair. She wore a black tank top and a pair of short, tight jean shorts similar to Pinkie's.

"Hello!" said Pinkie Pie. "What's your name?"

"I am-" began the girl, but before she could finish...

PPPPPPPFFFFFFFFFFTTT!

Lightning Dust let out a loud fart. The new girl lifted her leg and let loose with a fart that was shorter but louder.

The instant Pinkie started laughing her butt off, her shorts were drenched.

"You're sure she doesn't mind?" said the new girl, looking a little nervous that she may have contributed to Pinkie's accident.

"Trust me, she thinks it's as funny as I do when I wet myself," said Sonata.

"Yep, she sure does!" said Indigo Zap.

Once Pinkie finished laughing, but still peeing, she said "That was really fun! So, what's your name?"

"I'm Sunny Flare. I went to Crystal Prep Academy with Indigo Zap. I would place second next to her in the farting contests, because I think it's even more fun to fart than she does."

"Ooooh! I like you already!"

...

Pinkie led the sirens, Lightning Dust, Indigo Zap, and Sunny Flare to the other girls.

"Did you not make it?" said Sunset, noticing how wet Pinkie's shorts were. "Or did one of them..."

"Girls, this is Sunny Flare! She's one of Indigo's friends and former classmates. She really loves to fart! She and Lightning Dust made me wet myself by farting so loud." Pinkie giggled.

"Nice to meet you, Sunny Flare," said Sunset. She shook Sunny's hand, and stopped to sniff. She looked over at Indigo, who was standing a fair distance away. "Is that Indigo or you?"

"It's me," said Sunny Flare. "A couple months ago I became a smelly girl. Indigo told me she knew quite a few, though she said they didn't smell as bad as her. So..."

"Hold on," said Twilight. She sniffed Applejack, then Adagio, then Rainbow Dash, recoiling slightly, then Lightning Dust, also recoiling slightly. She didn't bother with Indigo, she was sure Sunny didn't smell as bad as her. Twilight sniffed Sunny all over. She smelled of sweat, urine, and farts, and didn't smell as bad as Rainbow Dash. "You only wash once a week, you fart a lot, and when you have to pee, you do it in your shorts. And you use toilet paper and don't mess yourself."

"Wow, you're good," said Sunny, impressed.

Indigo playfully slapped Sunny's butt. Sunny giggled.

"How would you rate how I smell compared with the other smelly girls?"

"From least stinkiest to most," said Twilight, "Applejack, Adagio Dazzle, Sunny Flare, Rainbow Dash, Lightning Dust, Indigo Zap."

Indigo looked proud to be named the stinkiest.

"How come Lightning Dust smells worse than me?" said Rainbow Dash.

Lightning Dust farted loudly in response, causing Pinkie and Sonata to laugh, and Rarity to roll her eyes slightly.

"Because she farts more than you do," said Twilight.

Aria gave Sunny a wedgie, so that the other girls could see her pink panties. "Even though she uses toilet paper and doesn't mess herself, her underwear is still dirty and smelly, more so than her shorts, which is saying something."

"Aria Blaze, was that really necessary?" said Rarity.

"It's cool," said Sunny. "I like getting wedgies."

Aria let go of Sunny's panties, which snapped against her butt causing her to whimper slightly and then giggle.

"If you wet yourself all the time, how come your shorts are dry?" said Pinkie Pie.

"I usually either blow dry them or let them dry in the sun," said Sunny.

So, they walked along the path and hung out for a bit. Rarity sprayed air freshener around herself whenever Indigo got near her, not wanting her smell to get in the way of their fun.

Adagio sniffed Sunny. "You smell slightly worse than me. Probably because you fart more." She started to pee in her pants, sighing of relief and satisfaction. As if this was a signal, Wallflower did the same.

"When was the last time you peed in your shorts?" Wallflower asked Applejack, who looked dry.

"Yesterday," said Applejack.

Suddenly, the sky filled with dark clouds. The girls quickly ran under a shelter as rain poured down.

Only Pinkie and Sonata stayed in the rain, splashing around in the puddles and playing tag.

"Well, at least no one can tell they wet themselves now," said Fluttershy.

"I don't think they care," said Sunset.

"Rainbow Dash, darling, you should join them and get some exercise," said Rarity.

"And risk losing my smell? No thanks!"

"Trust me, unless there's a downpour of soap to go with it, no amount of rain will make your smell go away on its own."

"All right."

Rainbow Dash ran out into the rain and played around with Pinkie and Sonata.

Until, lightning struck, causing them to run back under the shelter.

At the first crash of thunder, Fluttershy let out a squeak and peed in her dress. She sat down with her arms wrapped around her knees, trembling in fright at the thunder.

Rarity patted her on the back. "There, there. It'll be over soon. We're safe here. And when we get home, I'll give you a bath."

Fluttershy started to feel much better. She noticed her dress was wet, but she didn't care. If anything she was looking forward to her bath.

Rainbow Dash, Pinkie Pie, and Sonata were soaked. Pinkie and Sonata sniffed Rainbow Dash.

"Yep, you still smell as bad as before!" Pinkie giggled.

Rainbow Dash was very relieved.

Though there was enough space for the 14 girls to stand without touching each other, they were close enough that everyone could smell the smelly girls, though Indigo stood in a corner. The rain made her realize how much she needed to go, so she started to pee her shorts.

Then, Sunset let out a loud, long fart.

PPPPPRRRRRRRRRRRRRRRRT!

"Here it is," said Sunset, who loved her gassy moments.

Pinkie giggled. "I think I'm even wetter than before you farted!"

"Didn't you just go?" said Rainbow Dash.

"I drank lots of soda after, remember?"

Sunny lifted her leg.

BBBBBBRRRRRRRRRRAAAAAAAAAAP!

Pinkie and Sonata laughed even harder.

"You should totally have a farting contest with us once the storm's over!" said Pinkie.

"That sounds like fun," said Sunny. "Though I can never beat Indigo."

"In that case, I'd suggest waiting a bit before challenging me, Sunset Shimmer, or Lightning Dust," said Rainbow Dash.

Sunset farted silently this time, not wanting to annoy Rarity too much, but she was sure Rarity wasn't as bothered by this as she used to be.

The storm did not let up for an hour straight, during which Twilight was holding herself and fidgeting, for she really needed to pee.

At the end of the hour, Sunny also felt an urge to pee. She sighed as she let it all out in her shorts. Adagio watched the rapidly-expanding wet spot on Sunny's shorts as pee flowed down her legs. Sunny loved the warm release, the wet feeling on her crotch and her legs as a puddle grew under her.

Twilight groaned. "Can you not do that now? I need to go really badly!"

"Just let it out here," said Wallflower. "It won't be the first time. And you won't be the first today." She felt how wet her jeans were.

Twilight relaxed. Wallflower did have a point. So, she closed her eyes and started to pee. She sighed in immense relief as her shorts and panties became soaked.

"It feels good, doesn't it?" said Sunny.

"Yes, and like she said, it wasn't my first time." Twilight accidentally farted and blushed while the other girls laughed. Except Rarity.

...

At 5:00 that day, Pinkie, Sonata, and Sunny were at Pinkie's house, with Rainbow Dash, Applejack, and Adagio there to time their farts. They had just finished dinner.

Pinkie and Sonata sniffed Sunny.

"Phew! You do smell bad," said Sonata.

"But not as bad as Rainbow Dash!" Pinkie said, giving Rainbow a wink.

So, Pinkie, Sonata, and Sunset each drank several bottles of soda with fart powder sprinkled in it and waited for it to take effect.

They did not have to wait long, for soon Pinkie let out a loud fart. Sonata giggled. Sunny farted next, a little louder and longer. Pinkie and Sonata giggled, then Sonata farted just as loud as Pinkie.

Only a half hour in, they felt a powerful urge to pee from all the soda they had drank.

Sunny lifted her leg.

PPPPPPPPPFFFFFFFFFFFFRRRRRRRRRRT!

Sunny farted so hard she started to pee. Her jean shorts and pink panties became soaked again and waterfalls gushed down her legs.

"Oh. Sorry about your floor, Pink-"

Pinkie Pie didn't hear her. She and Sonata were too busy pissing themselves laughing at Sunny's fart. Sonata involuntary let several farts ranging from one to five seconds.

"Um... Five seconds at most," said Adagio.

"And 16 seconds for your last fart, Sunny," said Applejack.

Once Pinkie pulled herself together, though still peeing, she lifted both her legs in sitting position.

PPPPPPPPPPBBBBBBBBBBRRRRRRRRRRRRRRRRRTTT!

Pinkie let out an explosive wet fart. She initially thought she had messed in her shorts again, until she realized they were just wet from sitting in her pee.

"17 seconds!" said Rainbow Dash.

The farting contest continued for quite some time, and Pinkie Pie, Sonata, and Sunny Flare all had fun with it. Sonata was able to fart for 16 seconds as well.

"All right, here's the point where I usually win!" said Sunny. She raised her smelly behind in the air.

BBBBBRRRRRRAAAAAAAAAAPPPPPPFFFFFFRRRRRRRRRRRTTTTT!

Pinkie and Sonata fell on their butts laughing, wetting themselves even more.

"Hoo, nelly!" said Applejack. "22 seconds!"

"I've done better, but that was pretty impressive," said Rainbow Dash.

Pinkie Pie got into the same position as Sunny.

FFFFFFFFFFFFFRRRRRRRRRRRRRRRRRRRRT!

"18 seconds," said Rainbow Dash. "Sorry, Pinkie."

Sonata stuck her butt out slightly.

PPPPPPPPPPPPPPPPPPFFFFFFFFFFFFFFT!

The fart blew her soaking wet skirt back a little, so her black panties were visible.

"16 seconds," said Adagio.

Their gas was gone after this.

"Sunny Flare wins!" said Applejack.

"All right!" said Sunny Flare, slapping her butt.

Pinkie and Sonata giggled and shook Sunny's hands.

"Now, what do you say I give y'all a bath?" said Applejack.

"Not me," said Sunny. "I'll just blow dry my shorts. Remember I'm a smelly girl like you." She winked at her.

...

That night, Aria slept over at Rarity's house. They lay in sleeping bags close to each other, and wore their usual pajamas: Rarity's light blue tank top and short, tight purple shorts, and Aria's similar purple shorts and matching midriff tank top. Of course their sleeping bags smelled slightly from how often they had peed in them, but they didn't mind.

Rarity farted loudly, and blushed. "Oh my... I'm dreadfully sorry. I meant that to be silent. That was so unladylike."

"I don't mind," said Aria. "Besides, we both like doing something a lot dirtier that I think we're both gonna do tonight. What's a fart compared to that?"

"You have a point."

Aria let out an equally loud fart of her own. Rarity giggled a bit, and, before she could stop herself, farted even louder.

The next morning, Rarity and Aria both woke up in wet shorts. They felt how wet they were, took a whiff of the fresh pee smell, and giggled.