Niantic has announced that a Special Raid Weekend will take place from Friday, March 15th, 2019 until Monday, March 18th, 2019 where players of Pokémon GO will be able to challenge Rayquaza in Raid Battles.

Challenge Rayquaza in this Special Raid Weekend!

Trainers, Are you ready for a challenge? From Friday, March 15, to Monday, March 18, there will be a Special Raid Weekend! The Legendary Pokémon Rayquaza will be available in Raid Battles! Take a look at the details below:

Date + Time

• Friday, Mar. 15, 2019, at 1 p.m. PDT (GMT −7) to Monday, Mar. 18, 2019, at 1 p.m. PDT (GMT −7)

Features

The Legendary Pokémon Rayquaza will be joining Raid Battles!

Do you have what it takes to take on Rayquaza? Get ready to GO, Trainer—and best of luck! Stay safe, and happy exploring!

Source: https://pokemongolive.com/en/post/weekendraid2019-rayquaza/