Niantic has announced that from November 20th, 2018 until December 18th, 2018, Pokémon GO players will be able to battle Cresselia in Raid Battles.

A new phase of Raid Battles begins with Cresselia!

Trainers, As Pokémon’s legendary year is coming to a close, there will be an exciting appearance of a Legendary Pokémon originally discovered in the Sinnoh region. The Psychic-type Legendary Pokémon Cresselia will join Raid Battles on November 20 at 1:00 p.m. PST! Details below:

Date + Time

• Nov. 20, 2018, at 1:00 p.m. PST (GMT −8) to Dec. 18, 2018, at 1:00 p.m. PST (GMT −8)

Features

• Cresselia will appear in Raid Battles!

Don’t miss this chance to catch this Legendary Pokémon before it returns to its shrine! Stay safe, and happy exploring!

Source: https://pokemongolive.com/en/post/legendary-cresselia/