Following the recent reappearance of Groudon, Kyogre and Latias, Rayquaza will reappear during the following weekend in Pokémon GO. It will appear during Friday, March 15, to Monday, March 18,  starting and ending at 1 p.m. PDT.

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!

It has been confirmed on the Japanese Twitter account, as well as on The Silph Road Reddit, that Rayquaza will not be Shiny during this event.

レックウザに挑もう

3月16日（土）早朝から3月18日（月）にかけてレイドウィークエンドが開催！
「伝説レイドバトル」に「レックウザ」が再登場します！ ※今回のイベントでは、色違いの「レックウザ」は出現いたしません。
詳細はこちら: https://t.co/5GpwWr3X5m #ポケモンGO pic.twitter.com/P4r4Gj7zva

— Pokémon GO Japan (@PokemonGOAppJP) March 6, 2019

Are you keen to see Rayquaza return despite the lack of the super-cool Shiny form?

Thanks to HeroLinik for the tip.

Source: Daily.pokecommunity