New Raid Boss Return: Cresselia
On May 23, 2019, Niantic announced the return of several raid bosses taking place across the month of June.
On May 27, 2019, Cresselia will return as a raid boss and will have a chance to become shiny. She will be the bos until Jun 18.
After that, Kyogre will return as the raid boss until June 27th.
And finally, Groudon will return until July 10th.
See below for the full announcement.
Full Announcement Text
We hope you’re enjoying Extraordinary Raid Week so far! We’re excited to announce the next three Legendary Pokémon you can look forward to seeing in five-star Raid Battles. Expect to see some Legendary Pokémon return—riled up and ready to battle!
This Psychic-type Legendary Pokémon is said to represent the crescent moon, but don’t let its graceful exterior lull you during battle. Psychic-type Pokémon are weak against Bug-, Ghost-, and Dark-type Pokémon, so be sure to have those ready!
Date + Time Monday, May 27, 2019, at 1 p.m. to Tuesday, June 18, 2019, at 1 p.m. PDT (GMT −7)
- If the workings of the cosmos are in your favor, you may encounter a Shiny Cresselia!
The Sea Basin Pokémon is said to have widened the seas and waged battle with Groudon. This Water-type Pokémon is weak against Grass- and Electric-type Pokémon. Can you earn this powerful creature’s trust and convince it to battle alongside you?
Date + Time
- Tuesday, June 18, 2019, at 1 p.m. to Thursday, June 27, 2019, at 1 p.m. PDT (GMT −7)
- Fortune favors the bold—you may encounter a Shiny Kyogre!
Groudon is said to have dueled titanically with Kyogre before falling into a deep slumber. It’s a Ground-type Pokémon, so, Trainers, this means Water-, Grass-, and Ice-type Pokémon are your best bets for defeating this powerful opponent!
Date + Time
- Thursday, June 27, 2019, at 1 p.m. to Wednesday, July 10, 2019, at 1 p.m. PDT (GMT −7)
- Keep persevering, Trainer—you may encounter a Shiny Groudon!
This is your chance to catch Kyogre, Groudon, and Cresselia! It’ll be tough, but we have faith in you, Trainers. Legendary Pokémon only appear when the time is right—this must be fate. Are you ready to be a Battle Legend? Show us what you’ve got!
—The Pokémon GO Team