Dumbledore doesn't reverse the trap he laid on the Mirror in time. The Mirror traps Harry and Voldemort outside of Time... and inside the MLP universe. MLPxHPMoR Crossover.
Rainbow Dash is trying to adopt Scootaloo, but the filly has a shameful secret. She doesn't know what she is, only that she can't eat like other ponies, and anypony who knew would hate her forever.
Something has happened and Twilight finds herself in a strange and dark new world. The Bipeds here have strange magic, advanced technology, and a lot of problems. She needs a few friends, and they just might need her. WORM crossover.
While studying an alien spellform, Twilight makes the most important discovery of all time... The one which could doom her planet. | Horror Rationalfic with Lovecraftian & World of Darkness elements. Deconstruction / Subversion of Displaced.
A strange mare arrives in Twilight’s library, claiming to be her future self—here to stop a terrible plague. But Twilight worries that this stranger’s bold claims may hide something more sinister.
Flitter thinks Fluttershy is the weakest pony in the world. Flitter has never confronted what Fluttershy's job really means. Nopony ever wants to or should. Now Flitter has to. And 'weak' will turn out to be exactly the wrong word.
The Buffalo Telegraph told Clyde that a stranger was coming to call. It did not tell him that she was carrying something dangerous, or that evil people were close behind her. And it certainly did not tell him how much she would someday mean to him.
Lyra thinks Discord is an idiot for not thinking to dodge when the Elements of Harmony were about to strike him. Discord thinks this is the perfect opportunity for a game.
After finding Discord hiding out in his closet, Twilight Sparkle soon learns the most horrible of truths about herself and the world surrounding her. And then she learns another truth. And another. And another.