Here are the Pokemon Go Raid Bosses for August 2019. We will give updates as the bosses change.
Update: Updated the list with the Water Festival 2019 event going live.
Krabby Lotad Wailmer Wingull
Clamperl Feebas Marshtomp* Quilfish
Vaporeon* Machamp Azumarill Sharpedo
Blastoise* Lapras Tyranitar* Absol
Rayquaza (From now until September 2 according to Niantic) Uxie, Mesprit or Azelf (Only on August 28 from 6 to 7 p.m. local time according to Niantic)
According to Niantic, Rayquaza has a slim chance to be encountered in its shiny form once you beat it.
Team GO Rocket appeared in Pokemon GO last July. Certain Pokestops have a Team Rocket member waiting to challenge you in a Trainer Battle. Once you beat them, you can catch the Shadow Pokemon they leave behind and purify them to make them stronger.
According to an in-game message, Poliwag, Grimer, Muk, Drowzee, Hypno, Cubone, Scyther, Magikarp, Houndour and Houndoom joined the roster of Shadow Pokemon Team GO Rocket can have (with Raltz coming later). The message also said that Shadow Pokemon can’t learn moves exclusive to Community Day, so be sure to purify the Pokemon before evolving it on a Community Day where it’s featured so you can get the move.
Niantic recently announced that Pokemon GO received the Sport in Life award from the Sports Agency, a subsidiary of Japan’s Ministry of Education, Culture, Sports, Science and Technology which works to help promote a healthier lifestyle.