Flutternight

Applebloom, Sweetie Belle, and Scootaloo finds themselves in a dark dream world. The only thing they need to do to wake up is to survive, or die.

The CMC (Applebloom, Sweetie Belle, and Scootaloo) slept at Fluttershy's cottage for a night. They dreamed the same dream. With a dark creature who's following them around and messing with their minds, they tried to survive the dream world, finding more places.