He may also appear in shiny!
Rayquaza has come out of hiding from the ozone layer and back to raids all of this August. This serpent/dragon legendary challenges even the best of trainers. Make sure to bring your Ice, Rock, Dragon and Fairy type Pokemon to this battle if you want a chance to catch him.
If your lucky he may also appear in shiny form! So make sure you battle him as often as you can.
Event: Rayquaza returns as a Tier 5 Raid boss
Date & Time: From Wednesday, July 31, 2019, at 1 p.m. until Monday, September 2, 2019, at 1 p.m. PDT (GMT −7)
Also Additional Pokemon Storage
Pokemon Go has also increased it’s Pokemon storage. This will make many Pokemon collectors happy as you will now have an additional 500 spots bringing the total to 2500.