Humanity's space exploration ultimately took the form of billions of identical probes, capable of building anything (including astronauts themselves) upon arrival at their destinations. One lands in Equestria. Things go downhill from there.
An impossible creature finds herself in a world which already knows everything about her. Slowly, she learns about the true nature of her own reality, her world's place in the cosmos, and herself.
When one fateful search through the Everfree Forest leads Rarity to a secret library inhabited by the spirit of an ancient alicorn princess, she realises that it may be time to start believing in fairy tales.
There are ponies that are born great. There are ponies that achieve great things. Then there are ponies who have greatness thrust upon them. The only question for them, is what great things will they do?
I woke up this morning with a pink and purple stripe in my hair and Twilight Sparkle's voice in my head. I knew my mom should have listened when I said there was something wrong with me... Now I'm actually, certifiably, insane. Probably.
When Twilight seeks to return to the human world through the magic mirror, something goes horribly wrong. Now trapped in a galaxy far, far away and in a body that she barely understands, she seeks to find her way home.
Word has it that there is a tall bi-pedal creature that has been living in the forest for over ten years. No pony has ever made contact with it. That was, until now.
Princess Luna has found herself on a very different moon after some strange force interfered with her banishment. She doesn't know what the metal objects that keep orbiting and sometimes landing there are, but she's going to find out.
When Big Macintosh finds an injured pegasus mare in the Apple family's new barn, he and the rest of his family take it upon themselves to see her back to full health.
After the events of Project: Sunflower, Erin returns to Ponyville to study magic. Meanwhile, something is stirring on the newly-discovered world of Harmony.
After a promising breakthrough with an experimental spell backfires in the worst way possible, Twilight finds herself in a cubed world where she must learn how to use the world around her to survive. [realistic: monsters are more detailed]
Twilight meets her first transdimensional pen pal, and the two share letters back and forth across space and time. And when things escalate... just how much will things change? Between them, and their worlds.