Poor, Poor Ponyville

Poor, Poor, Ponyville, is the sixteenth episode of the seventh season of My Little Pony: Friendship Is Magic, and is the is the one hundred and sixty first episode overall.

Synopsis
A pessimistic baby red dragon by the name of Fireball pays a visit to Ponyville, who Spike is asked to look over, but things go wrong when Fireball gets loose and spreads his sorrow to the other ponies all around Ponyville.

Trivia
This episode seems to have a concept similar to the Powerpuff Girls episode "City of frownsville", and The Garfield Show episode "Parrot blues", as it involves an antagonist making many of the main and background characters cry.