In the Mojave, the Courier was doing his daily 'stupid shit', as Cass put it. The Courier is out with ED-E and Arcade.
"Why are we out here again?" Arcade asked, "I only follow you because I thought sending you out alone would be tantamount to murder, yet you have proven capable to kill everything that is a threat, why am I still following you around?"
"Because you is science, I is a stupid." Said the Courier, before he tripped.
"*BREEP BOOP BZZT BEEP*" ED-E beeped.
The Courier then popped up holding a small turtle above his head, proclaiming "Es una tortuga!"
"That's why." Arcade stated.
---Ponyville Library---
"Hey Spike!" Twilight yelled to the named assistant, "I went over all the variables, this dimention window spell I'm making should be ready for testing!"
"Alright, I'll get Fluttershy... Why do we need her?" Spike asked.
"Because it was modified from the teleportation spell, and Fluttershy can tame any possible creatures if it becomes a door instead of a window."
"Okay."
---five minutes later---
"Okay, I am going to start now!" Twiight exclaimed (no entendre intended if any could be made) as her horn started to glow.
---Back In the Mojave---
"I love turtles!" The Courier exclaimed, "I'm use this Transportalponder portal gun thing to get it home now!"
"... Did he just speak fucking Spanish?" Arcade asked incredulously.
---Ponyville Again---
A portal was started to form, but was still not clear.
"Did he just speak fucking Spanish?" a voice said, though the creature that said it was not seen.
"It's working!" Twilight exclaimed.
Then it got all explodey.
---a few minutes later---
"mmmmmseñor tortuga es rapidamente... PINEAPPLE!" the shorter creature mumbled, then yelled as he popped up.
"EEP!" squeeked Fluttershy.
"*breep..." beeped guess who?
"I expected no less after we fought cowboy aliens..." Spoke the tall thing in a strange armor.
The two strange beings got up and started to get their bearings, while the strange eye bot just booped in protest. The shorter wore a strange outfit that looked cool (NCR elite ranger armor with all traces of NCR removed or painted over) and a Stetson like Applejack (he is four feet five inches tall). The taller one wore the strange armor (Enclave power armor). The robot was strange, and there was a turtle. Needless to say, they haven't seen weirder.
"I've been woken to worse than this. I am bored now. I's Marcus, who are you?" said the shorter man.
"They speak common Equestrian! Amazing!" Twilight exclaimed as she floated over a quill and piece of parchment.
"What name?! What name!?"
"hmm... doesn't seem that advanced in terms of linguistic abilities..." Twilight said as she wrote it down.
"Actually, he is sort of retarded, taking two shots to the brain does that," the taller man said, "I am Arcade, he is Marcus, and the robot is ED-E. Now, he asked you what your name i-
"Oh! My name is Twilight Sparkle," said Twilight Sparkle, who then had a look of shock on her face as what he said registered. "SHOT! He was shot twice in the head!?!"
"Yep!" Marcus said cheerfully, "I don't have to worry of it happening again cuz I haz no brain! Or heart. Or spine!" After saying this, he popped over to Fluttershy faster than even Pinkie could move, picked her up, and hugged her as if he was holding a giant stuffed animal. Fluttershy just squeeked at the spontaneous hug. Twilight was just staring in shock at what he said, then noticed the large gun on his back (the Dinner Bell) and revolver at his side (a Ranger Seqouia).
"How are you still living!?!" she then levitated Marcus's guns off of him, as well as the Gauss rifle from Arcade's back, then said "And why are you carrying these around?"
Marcus and Arcade nearly dove for cover when she had the guns pointed at them, which she didn't mean to do. Arcade just backed away a few steps, while Marcus pulled out a chainsaw out of his bag on his side (it's a messenger bag... yes, he was trying to be clever). That made Twilight drop the guns in fear. When that happened, Arcade ducked for cover, ED-E beeped in a way implying he was cussing Twilight out, and Marcus used himself as a meatshield for Fluttershy, who was confused by the action taken.
"IS LOADED! DON'T DO THAT! IT GO BOOM AND SHOOT!" Marcus yelled at Twilight, Fluttershy and Twilight' eyes widening with realization of what could have happened.
Then Pinkie came in.
"Hey Twilight, I was going to get supplies for pranks when I heard yelling, and I thought 'Oh my goodness! Something is gonna blow up!' then I came in to see the awesome explosion and told you this!" Pinkie chatterboxxed.
"Pinkie!?!" Marcus said with shock.
"HUMEN!" Pinkie responded.
"You know Pinkie?" Twilight said, quite confused.
"She popped out of a box and took thingy I wanted! Then boomed my face with the party cannon!" Marcus explained, then gave Pinkie a glare.
"I needed it to keep the universe from ending by Daleks!" Pinkie explained to Marcus, "plus, I know how people in your world are!"
"Not fair! Apocalypse happend! You met dumb raiders!"
"Why didn't you tell me that?"
"You didn't ask and you shot me in the face with cannon!"
"I'm going to pretend Pinkie's part about universe saving never happened, but you are from the apocalypse?" Twilight yelled at Marcus.
"The Wasteland is mostly civilized," Arcade started to explain, "he is also a hero that has stopped a gang of ex-criminals, an evil man who tricks people to go to this terrifying place and forces them there with explosive collars, and stopped an army by uniteing the Mojave wasteland."
"That... makes me feel better... I should probably find a way to tell everypony else about you without freaking everypony ou-"
"HEY EVERYPONY THAT LIVES HERE! I'M A HERO GUY FROM ANOTHER UNIVERSE! I HAVE A COOL ROBOT AS WELL!" Marcus yelled out the door.
After a few moments, Twilight then said "There is no mass panic, so that went better than expected."