My Little Pony: Friendship Is Magic

Season 1, Episode 10

Episode Title: Swarm of the Century

Air Date: 2010-12-17

Overview:

Everypony is making sure things are perfect for an upcoming visit by Princess Celestia to Ponyville, especially Twilight Sparkle, but trouble arises when a swarm of parasprites, adorable insects with ravenous appetites, invades the town.