We have tons of villains from My Little Pony: Friendship is Magic who ranged from spoiled brats, to mean ponies and monstrous creatures. While some have already changed and turned over a new leaf, others haven't.
So the ultimate question here is:
Which villains in MLP would you like to see reform?
In my personal opinion, I would like to see the Dazzlings reform. I have this weird headcanon that they return to Equestria as ponies (but still posses the ability to transform into sirens) and regained their voices back. The Dazzlings then attempted to regain the trust of others by doing good deeds to them and for them. So yeah. That is one weird headcanon of mine. (shrug)
Any villains in MLP you would like to see reform? Feel free to share your opinions below! (yay)