Princess Twilight Sparkle writes pony history by opening a portal to another world and making first contact with extra-Equestrian intelligence. Only snag: the portal opens at a pony ranch on Earth.
Nightmare Night, what a fright! Ponyville was no stranger to such festivity, much less to impossible, freaky things happening on an almost daily basis. So what happens when an unbidden guest appears in the spookiest night of the year?