"Them: Part 2" can be found here

‘They’ are the shadowy figures lurking just beyond the corners of your eyes, pulling the strings of reality and shaping it to better suit their intentions. They are the celestial bureaucracy, ensuring that everything works together orderly, smoothly, and harmoniously. And, in order to do that, They sometimes have to change a few things.
Things like changing a stallion named Cloud Buster into a lithe cyan mare with a multicolored mane and tail, renaming her Rainbow Dash, giving her a new set of friends, and changing just about everything about her life. However, Cloud—Rainbow—whoever he or she is now—isn’t willing to give up her old life, or her choice in her own destiny, without a fight.