Pokemon Go Shadow Raids Debut Next Week, Shadow Mewtwo Coming May 27 - GameSpot

Giovanni and his minions are taking over your local Pokemon Gyms.
Pokemon GO is a new project for mobile devices that encourages fans to search far and wide in the real world to discover Pokemon.

Pokemon GO News - GameSpot

Pokémon GO Rising Shadows Event

Pokemon Go Remote Raid Changes Were “Incredibly Difficult” To Make Says Niantic – NoxPlayer

What are Pokémon 144 145 and 146 in Pokemon GO?

Pokémon GO Rising Shadows Event

Meh: Who wants to be friends on Pokemon Go?

Long, Long 'Mon~! - This Week in Games - Anime News Network

Pokemon Go Rising Shadows event: Shiny Shadow Mewtwo & Master Ball debut - Dexerto

Shadow Raids debut during the Rising Shadows event! – Pokémon GO