Pinkie Pie was hanging out with Discord at Sugarcube Corner, for they both found each others' antics to be fun.

"Wanna try the cake?" said Pinkie Pie, handing him a huge cake.

"It looks delicious!" said Discord, as he took it.

He was about to bite into the cake when it exploded, showering him with frosting.

"Gotchya!" said Pinkie, who had rigged the cake to explode.

Discord chuckled, for he found it amusing.

"But there's cakes that aren't gonna explode in the pantry over there."

Discord walked over to it and opened the door, but a bucket of water fell on him. Pinkie fell on her back and laughed harder. Discord laughed a little more too.

"Wanna try some cupcakes?" said Pinkie, holding out a tray.

Discord stuffed one cupcake into his mouth and swallowed it whole, and immediately started breathing fire, for Pinkie Pie had put hot sauce on the cupcakes instead of frosting. He quickly drank some water, and laughed with Pinkie at her latest prank.

"Your pranks are really sneaky, Pinkie Pie!" said Discord. "I'm gonna have to top that sometime!"

...

The next day, Pinkie Pie put on skintight teal shorts and a yellow tank top, and began exercising.

She took a break, dripping with sweat, and as she was about to start again, a sudden urge to pee hit her. Was this the five sodas she had drank this morning? It didn't matter - she needed to go!

Pinkie zipped into her bathroom, and paused. She must have ran into the wrong room, for instead of a bathroom with a sink, bathtub, and toilet, there was an open field with a running waterfall. The sound of running water made her uncomfortable, but she decided she'd just go for a swim and pee in the water. She ran toward the river at the bottom of the waterfall, but hit an invisible barrier and fell on her butt. She banged on the barrier for about a minute, and, realizing she wasn't going to the river anytime soon, exited the room.

She looked for her bathroom, feeling her need to pee increase every minute, but she couldn't find it. It had to be the first door she checked. Someone had changed her bathroom into... she didn't know what it was, but it definitely wasn't a bathroom anymore!

She left Sugarcube Corner to look for another bathroom somewhere, and then ask Twilight to fix her bathroom. She found an outhouse, and tried to open the door, but it was locked, as the outhouse was occupied.

Pinkie didn't want to waste more time finding an outhouse. She was close to the train station, and she could hear the train coming in, so she boarded the train, deciding to use its bathroom.

As soon as the train took off, Pinkie zipped toward the train bathroom, but to her dismay it had an "Out of Order" sign on it. Pinkie returned to her seat and fidgeted, crossing her legs.

By now the sweat had evaporated off her outfit.

Pinkie was so focused on how badly she needed to pee that she hadn't been paying attention to where the train was headed. The train arrived at its destination - Appleoosa! Pinkie raced out of the train to find an outhouse. She ran toward the spot where she knew the nearest outhouse was, but it was lined up. Pinkie stood in line, doing the pee dance, but the ponies in front always took between three and five minutes, and there were ten ponies in front of her at the start.

By the time there were only five ponies in line besides her, Pinkie felt a jolt in her bladder. She didn't want to wait in line, so she ran toward the next closest outhouse. She was relieved that there was no lineup - but when she got close she saw an "Out of Order" sign.

She ran to the third outhouse in Appleoosa, and felt a little better seeing there was neither a sign nor a line. However, she found that the door was locked. It was occupied.

Pinkie would have to find a bathroom somewhere else! She quickly ran back onto the train, feeling more desperate by the second. She ran to the train's bathroom again, hoping it would be available this time, but the "Out of Order" sign was still up. So she returned to her seat and fidgeted even harder, crossing her legs as tight as she could.

After a VERY uncomfortable train ride, the train arrived at its next destination - Manehattan.

At a speed to rival Rainbow Dash, Pinkie Pie zipped to the nearest outhouse. To her immense relief, the door opened. Pinkie entered the outhouse - only to find that there was no toilet inside.

"WHAT?!?" exclaimed Pinkie Pie, feeling ten times more uncomfortable now that relief had been snatched from her at the last second.

She decided to go to a restaurant. It would have a bathroom, and she was feeling a little hungry. And thirsty.

Entering the restaurant, Pinkie ordered her meal, and a large glass of soda. She didn't care how much it would make her have to pee later, for she could use the bathroom right now.

Once the waiter left, Pinkie ran into the restaurant bathroom. All the stalls were empty, much to her relief. She was finally going to relieve herself and there was nothing that could stop her.

Pinkie entered the stall, sat on the toilet, and began to pee.

She had just peed for three seconds, and was about to sigh in relief, when suddenly the toilet disappeared, and Pinkie fell on her butt. She quickly stopped peeing and looked around. "Hey, what gives?"

She pulled her shorts back up and checked the other stalls. All their toilets were gone. There was something very fishy going on around here, but at the moment she didn't care what was causing it - she REALLY needed to go!

Pinkie returned to her table, fidgeting the entire time. Her meal of hay burgers and cake arrived, along with her soda. After wolfing down her food, she guzzled her soda in one gulp. She knew she'd regret it later, but she was really thirsty.

After paying the bill, Pinkie ran to the next outhouse, but found about eleven ponies in line for it. She wasn't sure she would make it if she stood in line that long, so she returned to the train.

Again, she found the train bathroom to be out of order. During the train ride, she could feel her need to pee increase drastically. The soda had already gone through her. Pinkie was more desperate than she had ever been in her life, and knew she was going to have an accident if she didn't find relief soon!

The train arrived in Ponyville. Pinkie wasn't sure what she could do. Her bathroom wasn't working, but there was always the hope there would be an outhouse available.

"Hey, Pinkie Pie!" said Rainbow Dash as she, Applejack, and Fluttershy walked up to her. "The three of us were just saying we should play some buckball with you, just for fun! You in?"

"You bet! Sounds like fun!" Pinkie had briefly forgotten how badly she needed to pee, because she loved playing any game with her friends and was never one to miss an opportunity to do so. She instantly regretted this, but felt it was too late to turn back now!

They made their way to a field. Pinkie Pie was on Fluttershy's team as usual, but Pinkie's extreme desperation prevented her from playing to her full potential. The pressure in her bladder grew heavier and heavier as the game progressed, and the pee sloshing inside her was very uncomfortable. At one point, she hit the ball with her rump, causing her to leak a bit.

"Pinkie Pie, what the hay is going on?" said Rainbow Dash. "You're usually so good at this!"

"I really, really, REALLY need to pee, like, REALLY badly!" said Pinkie. Her shorts were damp with sweat, and a little damper on the crotch where she had leaked.

"Why didn't you say so?" said Applejack. "There's an outhouse over there."

Pinkie ran into the outhouse without a moment's hesitation, only to find something that left her both puzzled and frustrated.

In place of a toilet was a hologram of a fountain. The sound of its running water made her leak a little more.

Pinkie ran outside the outhouse.

"That was fast," said Rainbow Dash.

"There's no toilet in there!" said Pinkie.

Applejack looked inside the outhouse. "Yes there is."

Pinkie ran into the outhouse again, but the fountain hologram was still there. She ran back outside and found a bush. She ran behind the bush and tried to pull her shorts off, but for some reason they wouldn't come off! She pulled as hard as she could, but it wouldn't work. Maybe it was how sweaty she was, though her shorts were only damp, they were far from soaked, and it would be very noticeable if she wet herself.

Pinkie leaked a little more, and she let out a frustrated groan and ran back to Ponyville.

Applejack watched her run. "Ah don't know what's gotten into her."

"She's just being Pinkie Pie," said Rainbow Dash.

Fluttershy giggled.

Pinkie decided to use a bathroom in Twilight's castle. It would be cooler inside, and the sweat had evaporated off her by now. Twilight, Spike, and Starlight were away at the time, but this was partly her castle too.

As she ran, she felt like she was about to burst. She couldn't hold on much longer.

She ran into the nearest bathroom in Twilight's castle, but its toilet was gone. She ran into the second bathroom, but in place of a toilet was a boulder. She ran into the third bathroom, and saw the toilet there. Feeling relieved, she made her way toward the toilet, but it suddenly turned into a miniature tree.

Pinkie could hold it no longer. She began wetting her shorts, sighing in relief at the feeling of the warm wetness soaking her crotch and her back legs. Rivers of pee gushed down her legs and a puddle rapidly grew under her.

It felt a little embarrassing to pee herself like this, but Pinkie had done lots of weird things, and she really enjoyed this feeling. She also took great pleasure in the immense relief at letting go after holding it in so long. She even felt a little aroused.

She peed for just under three minutes, and was almost disappointed when she was done. "Ahhhhh, that's better."

In a flash of light, Discord appeared. "Gotchya!" he said, and the tree turned back into a toilet. He also made Pinkie's puddle disappear, but her shorts and legs remained wet.

"I don't get it," said Pinkie.

"Your sudden need to pee? All the bathrooms either being lined up, occupied, out of order, or toilets missing? How you couldn't get your shorts down? I was behind it all! It was all a prank, to try to top yours!"

Pinkie giggled. "Well, you sure did! It was pretty funny!"

"Should I do it to Rainbow Dash sometime?"

"Go for it! She will try to hit you with bigger pranks in return."

"Bring it on!"

"But, never, ever, EVER do that to Fluttershy!"

"Of course I won't. I'd never do that to her." And he meant it, for he knew how sensitive Fluttershy was. "Want me to dry you off?"

"No, I'm fine," said Pinkie, and she cheerfully bounced back to Sugarcube Corner, not caring how many background ponies saw her.