Changelings

The Changelings are the minions of their leader Queen Chrysalis. They have a pony-like appearance along with insect features. They change their appearance to match that of ponies; in particular, Queen Chrysalis shapeshifts into Princess Cadence, and several changelings take the form of Twilight Sparkle and her friends. They have sheer insect-like wings, fangs, horns, and holes in their legs. They are able to use magic from their horns, allowing them to imitate both Pegasus and Unicorn ponies.

Trivia

 * The Changelings will become the enemies of Thomas and his friends in Thomas' Adventures of My Little Pony Friendship is Magic - A Canterlot Wedding (Full Movie).