My Little Pony and... South Park?

Stan was casually walking through the little village when another pony crashed into him.

"Hey, watch where you're going next time!" He yelled at the dark green pony.

"GAH! Sorry! Wait, Stan? Is that you?" The pony replied, who it turned out was Tweek! Stan and Tweek had a short conversation about how the hell they were going to get home and turn back in to humans.

"Maybe Cartman would know? I mean, he did get us here in the first place so maybe he can get us back!" Tweek said. Stan agreed and told him to come to help him find all of their friends first.

They were walking together when they heard a familiar voice in the distance.

"Is that... Cartman?" Stan muttered.

"Shut up you gay little pony!" Cartman shouted at a little pink filly.

"Gay? Who do YOU think you're calling gay, you fat bully?" The pink filly shouted back. "And what in Celestia's name is your Cutie Mark supposed to be? A dollar sign? That just looks really stupid!"

"Cutie mark?" Then he noticed the symbol on his flank. "What the hell is that?"

"You seriously don't know what a cutie mark is? You are SO lame!"

"I DO know what a cutie mark is! It's the stupid picture on my ass!" Cartman replied before seeing Diamond Tiara's (The pink filly) cutie mark. "Huh, at least I don't have a stupid gay tiara on my ass like YOU."

"Stupid... gay... tiara... stupid... gay... tiara?" You see, nobody had ever made fun of her cutie mark so she felt extremely offended. "It's MY cutie mark! Nopony ever insults Diamond Tiara's cutie mark you awful meanie!" She then started to think about her cutie mark. What did the little tiara represent? Why was her cutie mark so stupid? She ran away crying. Cartman smirked; he loved to make sure nobody got away with insulting him.

"Cartman!" He heard Stan shout. "Get your fat ass over here now!"

"Ay! I'm not fat I'm just big boned, Stan!"

"Just get over here!" Stan said to him as he hovered over to them.

Stan and Tweek noticed Cartmaan's stumpy wings. "You have wings?" Cartman nodded, but before he could even begin to rub it in Stan and Tweek's faces they heard Butters scream from behind them.

Kyle and Ike had been walking when they heard Butters talking to another pony. He was talking to Kenny; they bumped into each other when trying to find Catman. He was chatting to him about how they could get home, when he spotted Kyle walking towards him.

"Oh hey, Kyle! I was just talking Kenny about finding our other friends!" Butters smiled, then saw that Ike was a dragon.

"Oh, hamburgers! Why is Ike a little dragon, Kyle?"

"I don't know, Butters! I think it's because...." Before Kyle could finish his sentence, Ike's stomach growled and he let out an almighty burp. It wasn't just a normal burp however, it was followed by a huge green flame and a scroll. Butters screamed as the scroll hit him in the face.

Tweek and Stan ran towards Butters, and when he noticed Kyle, Stan ran straight towards him and said

"Kyle... Do you have any idea what's going on?"

"I don't know Stan, but Ike just threw up this scroll thingy... maybe it has something to help us get home written on it?" The scroll said:

Dear Ponies,

I know that you aren't from Equestria, and want to help you get back to your own universe as soon as possible. A golden chariot is on its way to take you to my castle, which will land by the library at the centre of Ponyville. I hope to help you find your way home successfully, because the ponies you have swapped places with are essential to keeping Equestria safe. I will be seeing you soon.

Yours sincerely, Princess Celestia

"Mmphphs Mphestia?" (Princess Celestia?) Kenny asked.

"I don't know who that is, but if they can help us get home then I don't really care!" Butters said.

They were all waiting by the library when they saw the golden chariot coming towards them. They hopped on and were whisked into the sky quicker than they imagined. Within five minutes they were in Canterlot, and as they entered the castle they came face to face with Princess Celestia...

Twilight and Spike left the (empty) house they'd woken up in and were instantly greeted by an extremely hyper Pinkie Pie. Twilight didn't have time to comprehend that Pinkie Pie was a human too, when Pinkie said

"OhheyTwilightwhatareyoudoinghere?" But she spoke so fast that Twilight hadn't a clue what she said at all!

"Er... What?" Twilight asked. Before she could answer, they spotted Fluttershy sneaking out of a house by them.

ONE QUICK CONVERSATION LATER

"So... how ARE we going to get home? You can't exactly use a spell..."

"YeahTwilightyourhornisGONE!"

"There's got to be some way of getting back home, hasn't there?" Twilight said nervously. Then they heard someone calling them.

Applejack had walked downstairs to see who had called to Stan. Maybe she'd know what the hell was going on. After a short conversation (in which Applejack told her everything that had happened), Stan's mom shrugged it off as one of the kid's games and told her to go and get Stan. As she exited the house, Applejack noticed some humans that looked like her friends. She called out to them.

Rainbow Dash smiled as she finally convinced Cartman's mom to give her some of Eric's KFC. She didn't know what KFC was, but it smelled amazing to  bucket; after all, Cartman wouldn't know because he was in an entirely different universe!

"Are you one of Eric's friends? I haven't seen you before, did you just move here I take it?"

"Errrr... Yeah, sure, I'm Eric's friend..."

"Well, tell him to come back home soon so Mommy can tuck him into bed!"  Rainbow Dash nodded before grabbing another piece of KFC and leaving to find Twilight.

".... and so that's when I woke up in this dirty little room!" Rarity said to the little girl (Who was Kenny's little sister Karen) She sat there, realising that the girl she sat next to was a unicorn and asked her many questions about her species. Rarity told her that her questions could be answered later, and that for now she'd need help finding her other friends.

"Maybe they're by Kenny's friend's houses!" Karen exclaimed.

"Good thinking, Karen, I guess that's where we shall go!" So Karen and Rarity headed towards the houses.

All the girls were finally back together, and trying to find a way back home.

The ponies were facing Celestia wondering what she could really do.

HOW WILL THESE BELOVED CHARACTERS GET BACK TO THEIR HOMES? FIND OUT SOON!