The Raid Hour event happens every Wednesday of the month for one hour and it features Pokemon that are new, rare, or if a Legendary/Mythical Pokemon is available at that moment.
Usually, the event is held for one hour, from 6:00 p.m. to 7:00 p.m. local time on a Wednesday. Besides rare Pokemon, the event also gives us a chance to get these beasts with their exclusive moves.
Here is the schedule for June 2021 Raid Hour Bosses and dates.
The first Raid boss that we will have is Regirock, which will join us on June 2nd, 2021. The next Raid Boss on June 9th will be Registeel and the next Wednesday, June 16th we will have Regice. The last two Wednesdays of the month are to be announced (maybe new Pokemon?).
Do you have these Pokemon? Maybe now is the chance to stack up those candies and power up the Legendary titans.