What is the last season you watched? Fluttershy had a couple episodes (a few seasons ago. They just finished Season 8) where she became a Vampire-Pony cause of magic. Cause she wanted to talk with fruit bats. As a Vampire-Pony she is more impulse, and monster-like. She goes after apples in this form (why people make the joke of Flutterbat going after Applejack).



Also Discord becomes more of a good guy over time and Fluttershy is his first, and closest friends. They have a few episodes over the seasons about Fluttershy and Discord's bond.