My Little Pony: Friendship Is Magic (2010)

S01E10 Swarm of the Century

As Ponyville prepares for Princess Celestia's anticipated visit, everypony is focused on ensuring everything is just right, particularly Twilight Sparkle. However, chaos ensues when a horde of parasprites, cute yet insatiable little creatures, descends upon the town, threatening to disrupt the carefully laid plans.