Long ago, an Autobot spacecraft crashed on Equestria, and things changed. But the implications weren't understood until many centuries later when a stolen ship crashed there as well with a ship full of Autobots and one "human" following in pursuit. Many ponies will have to learn to live a second life once they discover the truth about themselves.
Here is some of the art that helped inspire this.
and an Autobot image I didn't create
along with some Decepticons I didn't create.

The first part in the Light and Darkness Series

We will kill you all! Even if we have to do it one pony at a time!

Princess Celestia wants Princess Luna to make some new friends now that she has returned from being Nightmare Moon. Luna is already acquainted with The Elements of Harmony and that's really about it. Celestia wants Luna to go visit Ponyville, a much less formal place than Canterlot to possibly make some new friends. However, little that Celestia even Luna knows, this will soon be the worst idea that Celestia has ever had.

Based off the famous movie: An American Werewolf in London.

After resolving the vampire fruit bat infestation at Sweet Apple Acres, everything seems to have gone back to normal. But for Fluttershy, things are anything but what they used to be. As she begins to change, Fluttershy wrestles with what she is and what she may become.

It's been a few days since the vampire fruit bat incident, and Twilight had undone the effects of the spell from Fluttershy. But now she's locked herself with crates of apple juice in the clock tower, can Princess Luna, Twilight and the rest of her friends do something?

Vinyl gets bitten by a vampire. After almost killing her roommate, she seeks out to find a cure for her curse. But she can't do it alone. She brings with her the loyal, fearless mare, Rainbow Dash and the wise zebra, Zecora.

For Rarity the mirror has become an instrument of torture. Everything she runs across is a reminder of the inevitability of old age and loss of her beauty. Convinced she can keep her youthful looks, she ventures into the EverFree Forest for answers. During a chance encounter with a mysterious pony, her wish is granted. However, Rarity is changed into a vampire, who's sole purpose is feeding her bloodlust. However she is not the greatest threat. The mysterious pony Rarity had come across is an ancient evil, merely using Rarity as a puppet and who is bent on the elimination of the Royal Sisters and conquest of Equestria.

One cold autumn night, Twilight Sparkle lets in a pale and weary traveler into her home. When she accidentally discovers his dark secret, she is assaulted by him, and is left to die... When she woke up, she finds that she has been turned into a Vampire, an ancient enemy of Equestria last seen during Nightmare Moon's Rebellion. She now walks the thin line between life and death, sustained only by the blood of others.

Her friends now race against time to find a cure for this ancient curse, and stop the Vampire who infected Twilight, before he can create a new army of Vampires to conquer Equestria. Otherwise, Twilight will join the forces of evil and darkness, as the Bride for the Lord of Vampires. They have to work quickly, as every day passes, Twilight's thirst for her friends' blood increases...

This story is a sequel to My little Omniverse

It has been a few weeks since Ben 10 and Rook's adventure in Equestria, but now Ben and his partner must return to Equestria to defeat the undead ghostly villain from his world Zs'Skayr (pronounced "Zuh Scare") from turning Equestria into a land of darkness and ruled by his kind.

While pursing Michael Morningstar, Ben 10 and his partner Rook are sucked into the land of Equestria. With Ben and his partner finding refuge with the mane six and the princesses, an old enemy of Equestria require Morningstar's help to take over the land. Can both Ben, his partner and the mane six stop the combined power of King Sombra and Michael Morningstar?

(All art in this Fimfic is owned by their respected makers)

Bioshock meets MLP in this psychological thriller, where Celestia's new faithful student, Siren Song, must discover the truth behind the city beneath the waves.

Beautiful, gifted, and faithful student of the Princess of the Sun, Siren Song has very nearly everything a pony could want. Sometimes though, in the twilight hours, Siren can see the sadness in her mentor's eyes. Once, ponies whisper, the Princess had another student named Twilight Sparkle, but she left Equestria, never to return. The pony who has a perfect life just needs one more thing—to convince Twilight Sparkle to come home so the Princess will smile again. But when Siren arrives in pursuit of Twilight, she soon finds herself trapped in a city of horrors, with only its monstrous denizens for help.

Now with a TV Tropes page!