You know, Rarity has been the character that has had the most corruptions in both the series and the comic:
Series: Rarity corrupted by Discord (Season 2), Inspirarity (Season 4).
Comic: Nightmare Rarity and Evil Rarity (Dark Water)
One would say that in the future she could become a great villain…one day, in fact her evil clone does not even reach the original Rarity.
Note: Pinkie Pie, would be the second place to have more corruptions (but of course … according to some users does not count Pinkamena Pie)
Series: Rarity corrupted by Discord (Season 2), Inspirarity (Season 4).
Comic: Nightmare Rarity and Evil Rarity (Dark Water)
One would say that in the future she could become a great villain…one day, in fact her evil clone does not even reach the original Rarity.
Note: Pinkie Pie, would be the second place to have more corruptions (but of course … according to some users does not count Pinkamena Pie)