One-Hoof mare

After realizing she was weak, Fluttershy trains to become the ultimate hero! Too bad that means never being challenged in life, but who needs that?

It's Fluttershy AS one-punch man. I mean, it writes itself! Come look upon the wacky, silliness that this is! Shut off your brains, and read on as Fluttershy defeats her foes, with just one hooooooooooooooooooooooooooooooooooooooooof!!!