The Pokémon Company has uploaded a mysterious preview video that teases an upcoming announcement of some sort. The video contains gameplay footage of strange occurrences that take place in various games in the core Pokémon series, including Pokémon Sun and Moon. You can check out the video below, followed by a fan-translated description:
Pokémon Mystery File
A world of Pokémon you don’t know
Is this a time slip? Is it manipulating time? It came from the moon? Is it a space virus? Is this an encounter with aliens? [Dialogue] Thank you. With the power it has received from your Solrock it looks like it can return home… to the sky! Is this a UFO appearance? Is this an alien invasion? [Script] The battle with the alien invader has begun! Is this the underside of this world? Is this a puzzle of ancient relics? Is this an attack from a parallel universe? Is it possessing humans? [Written in Unown] Is something happening?