Xenomorph Goes to Equestria
Once upon a time, a cuddly Xenomorph decided that it wanted to go to Equestria because of a contrived plot. He didn't make the rules, he barely understood the way the world worked. So the confused specimen found himself lost and lonely inside the darkest forest known to his kind. He was the terror of the space foundation thing and it terrified him for no other reason than he was only just a small Xenomorph barely into his life.
Terrible and nasty creatures growled at the weird and mysterious creature they didn't understand causing his undeveloped and not quite monstrous heart to quiver with fear. How was he ever to get out of this one? He didn't have his other friends with him to guide him through the forest. His mother would have sent comforting thoughts into his mind, but since she wasn't there, she could do no such thing. It was kind of hard for something to do something if they were weren't there after all.
So as the unknown and as of yet unnamed baby Xenomorph wondered through the forest he picked up some voices. Since he wasn't yet aware of where he was (other than deciding that he had to be there) he couldn't pinpoint just what the voices were saying or what species they were from.
Having decided to follow the source to discover just where he was, he was eventually startled to discover that there were no army of nasty monsters as he had originally thought, but instead a lone, butternut squash colored Pony. This pony was the color of a food he had no idea existed, but if he knew of what it was, it would have clued him into a very tasty food. She didn't look like food though cause of his story related passivity.
Deciding to sit there in the dark like a creep, he watched the strangely beautiful yellow pony that reminded him of foods he didn't know the name of. She was whining in terror because of the forest playing tricks on her mind and causing her poor heart to jump start in beats per minute. If the pony, (who I am sure you can guess is Fluttershy) could actually know this stuff, she would have thought her heart was acting just a tiny bit odd with how it jumped. It could have been from how terrified she was, but she was scared about ninety eight percent of the time so this information did not really help.
As the still unnamed hero of the story continued to enact his creepy instincts, he decided that he would go over there if she continued to spook at random noises that scared her for whatever reason.
"It's okay Fluttershy, it is all in your head and there are no goblins out to get you. Although it sure would be nice to stumble upon a nice goblin family that didn't look scary"
For reasons best left unsaid, the unnamed protagonist could understand this ponies thoughts. Why this was, he didn't know.
For whatever reason, a mean unknown animal decided to make a noise. Both Fluttershy and her creepy voyeur jumped in terror and whined in their native languages. Unfortunately for his voyeur tendencies, Fluttershy heard the noise and cowered further.
"Fluttershy..." the butter yellow delight said in a pep talk to herself, "You have got to stop cowering at random noises. Maybe somepony is lost and scared in this creepy forest and needs your help to get back to civilization. That would be nice"
Being right, but not yet knowing why or how, Fluttershy decided to abandon her cowardly ways and bravely decided to check up on the source of the yell she had somehow heard.
Realizing that his cover would soon be blown and panicking that maybe she wasn't as nice as she had seemed, the still unnamed hero of this story began to go through panic. He had never panicked before. It sucked and made him feel ill. He wished he wouldn't panic and decided to think of happy thoughts. Like frosting. Why he was thinking of frosting while getting the stuffing spooked out of him was beyond his reasoning capabilities.
"Hello?" Fluttershy called in the typical clueless female character way. "Is somepony there?"
What was a pony? Our lead had no idea. He was barely the equivalent of two life moons (two years) old and could barely understand anything other than "I am scared" or "Why is that pony pretty?"
"I am warning you! I am armed!" Fluttershy had no idea why she had said that! She was a pacifist and barely punched things out of anger like any decent minded pony. But she had heard Pinkie say it to the creeps in the ally way near Sugercube Corner, and liked the way it sounded.
Now our protagonist was starting to quiver in terror, ironic for one such as him. His kind thrived on scaring the hell out of other creatures and yet, his little heart decided that it wanted out right now. Terror rooted him to the spot though, so that thought died tragically on the spot.
Around this time Fluttershy wandered to the spot where the quivering bundle of nerves lay, and stopped in her tracks. This was not a "Holy moly, a big scary monster" kind of stop dead in her tracks sorta way, but a "what am I looking at" sort of way. She had no idea what the thing in front of her was.
It had no visible eyes, was drooling a bit (that could do with some tender loving care) and was quivering as if it would go out of style. But Fluttershy had only an eye for one or two things. Maybe more, but her brain short circuited for a bit at coming into unaware contact with a new species.
"What are you?"
The literally quaking, questioningly monstrous form of Xenomorph hesitated in his frightful quivering and realized that she was not scared any more (why was that) and instead a healthy, if questionable interest arose in the air around him.
"Are you a changeling?"
The xenomorph who was still unnamed, tilted his small, underdeveloped head in confusion. Then it gave a shrug in the language of it's people.
"You don't know? How does that work? You don't look like a changeling." As Fluttershy stared with rapidly growing love at the new and exciting thing in front of her, another thought rose unbidden in her gut. "You aren't dangerous are you! Twilight said I can't bring back any dangerous creatures after last time."
The Xenomorph stared at himself as if asking his body what the answer was. Since he wasn't getting anything back, he stared up at the pony and gave another shrug. He didn't want to hurt this strangely attractive pony. His instinct was telling him that she would make a great mother though. Why was it doing that?
Fluttershy grinned. "That's good enough for me. Why don't we get you back to Ponyville and you can see where I live. It isn't much and I don't know how I can take care of you if I don't know what you are, but I will worry about that later.
She reached out and thinking she was going to strangle him, he cowered away from her touch. Flutteshy grinned. Definitely not harmful. Maybe a little scary looking, but misunderstood. Where this came from, she didn't know.
"Easy there little guy. I'm not going to hurt you." Hurting things was against her religion after all. Hearing the smooth, gentle tones that Fluttershy was known for around these parts (But not the Everfree as that place scared the dickens out of her and therefore nothing knew her there) he at last decided that she wasn't going to eat him, and leaned toward her embrace.
"You are quite the interesting creature. I wonder what you are." Fluttershy, gently picked up the unknown creature in front of her. "Wow you are somewhat warm. I wonder why that is."
The pony's grip was comforting and this exhausted the Xenomorph. He felt safe in her embrace, but did not know why. He relaxed further, finally deciding to nuzzle the strange, soft little pony. Fluttershy grinned in motherly adoration. She really had to control this instinct, but felt often times when cuddled by strange creatures, she couldn't help herself.
"You are really affectionate for a seemingly scary monster. I shall call you Jerry. Are you ready to go home Jerry?" She didn't know why she had said it, but felt she had to. "The house will be so much more lively with you there. Ever since Angel..." But Fluttershy couldn't finish that thought as it pained her to think of what happened to her beloved pet.
Jerry, (finally getting a name) didn't know what happened to this Angel, or even what it was, but what he did know was his friend had sad, angry, and nasty thoughts rolling around and he didn't like it. So he gave her a comforting nuzzle and crooned comfortingly at her and hoped it would make her feel better.
"I'm okay Jerry, but let's go home and sleep. I... got lost in the Everfree late at night and now that you're here, I can go home."
Jerry, again had no clue what was going on, but he liked the idea of spending more time with the soft and pillow-like pony. As Fluttershy took him home, he crooned sleepily and happily on his new friend's back.
I guess they lived Happily Ever After or something, I wouldn't know.