TwiBowIty AppleShyPie is best pony.

You do realize this is a combination of all the best talents, right?

Pinkie's tail, for twitching
Rainbow's wings, for flying,
Applejack's back legs, for bucking.
Rarity's front legs, for which she primarily uses to work with sewing machines.
A portion of the face is Fluttershy's, the portion that illicits kindness.
And the top part of Twilight's, the mind and magic of the entire group.