Have you ever noticed how each pony in the Mane Six has gone through a transformation that was either evil or just really bad or creepy? Maybe the only exception is Applejack, but even she came very close with the whole pirate thing. Heck, even some characters that aren't even in the Mane Six (Princesses Celestia and Luna) had evil transformations!

Twilight Sparkle — Midnight Sparkle
Rainbow Dash — Evil anti-pie Rainbow Dash from Pinkie Pie's fantasy
Rarity — Inspired Rarity
Fluttershy — Flutterbat
Applejack — Pirate Applejack
Pinkie Pie — Pinkamena

Princess Celestia — Daybreaker
Princess Luna — Nightmare Moon

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