Somewhere in Discord’s reality, Screwball was simply enjoying life. The swirly eyed goofball loved all the wackiness of where she lived. From the displacement of gravity, to the pretty sky to simple things just not making sense, it was so much fun for her.

“Hehe, another great day in chaos.” She says with aplomb. “It’s so much fun, but I wish I had other ponies to play with.”

As if the universe heard her, there was a sound as a door appeared and Discord walked in. “Okay, I just need to get a couple things for my picnic with Fluttershy.” He went towards his house but absentmindedly left the door he came in wide open.

Screwball eyed that open door with curiosity. “There are other ponies beyond that door? This could be exactly what I’m looking for” With an excited squee she goes through the door and ends up in the real world. She goes towards the nearby town and sees ponies of all kinds, but something didn’t feel quite right.

“How come these ponies all look so different from me? They don’t have swirly eyes or fun propeller hats. How am I ever going to be friends with ponies that aren’t like me?” She decided to head back to the outskirts of town to think about it. Then she got an idea with a smile.

A bit later, she entered town again and somepony approached her. She had a red mane and a modest figure.

“Hello there, are you new to town?” The pony asked

“Yep, just got here.” Screwball replied with a smile

“Welcome to Ponyville. My name is Rose. Say, you look kinda funny?”

“Really? What makes you say that?”

“It’s your eyes. Are those contacts?”

“Why don’t you have a closer look?” Screwball leaned forward to look the other pony deep in the eyes, her smile turning mischievous. “Do you like my eyes?”

“Well they… look…” Rose started trailing off

“Yes?”

“They look nice…”

“How would you like to have some swirly eyes yourself. Then we can have all kinds of fun.”

“Yes, swirly eyes would be great…”

“Perfect, now hold still.” Out of nowhere, Screwball pulled out a big colorful hammer with a swirly design on the impact point. She raised it and slammed it down on Rose's head. Her head flattened with a cartoony effect and suddenly her once modest breasts exploded in size. After a moment her head returned to normal and she had swirly eyes just like Screwball.

“Hehehe, wow that felt great.” Rose started giggling and drumming her mouth with her finger.

“Actually, it’s missing something.” Screwball took out a propeller hat like her own and put it on the now swirly Rose's head. “Perfect, now how about you help me find more friends.”

“Yes, more friends sounds great. Can we make them swirly too?”

“Of course we can.” Screwball said with an evil looking grin. “Everypony should be swirly.”

“I know just the ponies to start with. Let me show you my sisters.”

With a big grin, Rose led Screwball to the flower shop that she and her sisters ran. The green haired Daisy and the yellow haired Lily were there running the shop.

“Oh Rose, you’re back.” Daisy said upon seeing her sister. But then she noticed something was wrong. “Er… Rose. What happened to you?

“I’m swirly and happy now. My new friend Screwball showed me how wonderful this is.

Lily raised an eyebrow and then saw Screwball. “What did you do to our sister?!?”

Screwball smirked. “You’re about to find out. Rosie, you can take the other one.”

“Okay.” Rose giggled and lunged at Daisy, easily pinning her to the ground.

While Lily was distracted by Daisy's plight, Screwball easily walked up to her and grabbed her cheeks so she could look Lily right in the eyes. “Don’t you like my swirly eyes?

“I… I…”

“Come on, aren’t they great?”

“Yes, they are great.”

Meanwhile, Rose was doing the same thing to subdue Daisy.

“Come on sis, it’ll be great to be swirly ponies together.” Rose said with giggles

“Maybe you’re right Rose.” Daisy replied, losing herself in the swirls.

Screwball then took out her hammer “Now comes the fun part.” She slammed it on Lily, and just like Rose her breasts grew massive and her eyes became swirly. Then once Rose had picked up Daisy she was slammed by the hammer as well, turning her into another big boobed swirly pony.

“You were right Rose, being all swirly is great.” Daisy said with glee. She and Rose then started making funny faces at one another.

Lily was giggling up a storm. “I feel so happy and swirly”

“That’s wonderful.” Screwball said with pride, putting propeller hats on the other two flower ponies. She then started to grope Lily’s massive breasts. “I gotta say, I love this side effect of my hammer.”

“Well, my brains gotta go somewhere right. They don’t belong in my head if I’m all swirly” She then joined her new friend in groping her own breasts, totally lost in the bliss.

“The more friends we get, the more ponies can enjoy this bliss. And soon, everypony will be swirly”

“Yay!!!” The three flower sisters exclaimed.

Sunburst was walking back home after taking care of a few errands around Ponyville. Once he was near the edge of town, he suddenly heard giggling.

“Huh, is somepony there?” He questioned

There was no response, just more giggling. It was starting to give Sunburst chills. "Okay, the joke's over. You can come out now." Still no response beyond more giggles. "For Celestia's sake, who's there?"

Suddenly, someone tapped Sunburst on the back. But when he turned around he was met with the goofy grin of Screwball.

"Hi there" she said, with Sunburst recoiling back in surprise

"Er… Hi" He said, unsure what to make of her "Who are you?"

"I'm Screwball, and you look very handsome." She said, retaining her grin

Sunburst was surprised at the compliment "Oh… Thank you."

"Yeah, me and the girls just couldn't take our eyes off you."

"Um… Who are 'the girls' exactly?"

His question was seemingly answered when there was another bout of giggling right behind him. He turned around to see the flower ponies, but not as he remembered them. They had swirly eyes and gigantic breasts.

"What in Equestria happened to you three?" He asked with surprise

"We're swirly now." Rose replied before making a goofy face

"We don't have to think anymore." Daisy said, punctuated with a cross-eyed look

"Why don't you join us?" Lily asked

"No way. I like thinking thank you very much" Sunburst tried to run but the girls reached out and grabbed his cape which kept him from going far. They reeled him in like a fish.

"Come on big boy, you'll love being swirly" Rose said pleadingly

"Let's give him a good look at our swirls." Lily suggested before they turned him around.

Between their combined grips and sandwiching his body between their enormous breasts, Sunburst could only wiggle as they looked into his eyes.

"Don't you like the swirls?" They asked together

Sunburst tried to hold out but the more they looked into his eyes, the more his thoughts slipped away from him.

"I guess… They look kinda nice" He said, his voice sounding monotone

"Great work girls. Now hold him still for me." Screwball took out her hammer while the girls turned Sunburst to face her. "I'm not sure what this'll do to a stallion. Only one way to find out though." She brought the hammer down right onto Sunburst's head and it was flattened. When that happened, an enormous bulge suddenly grew in his crotch and as his head returned to normal size his muscles grew too. Just like the girls, his eyes were swirly. Screwball was amazed. "Oh wow, it made you into a total stud. So how do you feel?"

Sunburst giggled. "I feel great, I don't have to think anymore because I'm swirly"

"That's right, and it looks like instead of going to your chest like the girls, your brains went straight into your crotch." Screwball said, admiring her handiwork. She undid Sunburst's pants to let out his cock and the size made her squeal. "This is perfect"

"I wonder if my cum is magical since all my brains went down there" Sunburst inquired with a goofy smile.

"That's a good question. Rosie, come over here and give our stud a good time."

Rose did what was asked of her and gave Sunburst a boobjob with her giant breasts. Sunburst moaned from the pleasure of the stimulation combined with the bliss of being a swirly pony. It didn't take long for him to cum, but instead of white it was rainbow colored and sparkly. It landed on Daisy but it seemed to defy gravity, leaving it almost like a literal rope of seed.

"Interesting, try pulling her towards you big guy" Screwball insisted.

Sunburst giggled and nodded and suddenly Daisy was brought to him for a love-making session

"So the girls get giant knockers and the guys get big dicks with magic cum." Screwball said with much joy. "I can tell I'm going to have so much fun." Screwball watched with an evil smile as Sunburst fucked Daisy silly while Daisy drummed her lips, completely lost in the pleasure. Meanwhile, Rose and Lily decided to have a passionate make out session while pressing their breasts together. Screwball seeing her new friends with their swirly eyes and propeller hats just like her made her incredibly happy.

Author's Note

This is a concept that just came to me while browsing Derpibooru. Many thanks to PrinceFive for their creative consulting and help. Hope to do more with this relatively soon