https://www.gamespot.com/articles/pokemon-go-psychic-event-and-new-shiny-pokemon-now/1100-6462306/

A new in-game event is now underway in Pokemon Go. With the Legendary Psychic-type Mewtwo now available in standard Raid Battles, the developer is giving players the chance to capture even more Psychic Pokemon with the Psychic Spectacular event, which kicked off on October 5 at 1 PM PT / 4 PM ET and runs until the same time on October 14.

During the Psychic Spectacular event, Psychic-type Pokemon such as Abra, Ralts, Baltoy, Slowpoke, and others will appear in the wild much more frequently than they normally do. Additionally, Niantic is rolling out more Field Research tasks revolving around Psychic Pokemon; completing these will help bring you closer to achieving a Research Breakthrough and crossing paths with Suicune.