What is a Primal Raid in Pokemon Go?

Trainers, Primal Raids are a new type of Raid introduced in Pokemon Go as part of the Pokemon Go Tour Hoenn event. Many players want to know what are Primal Raids, so worry no more, we got you covered.
The Pokemon Go Tour Hoenn Las Vegas has started and for the first time in Pokemon Go, players have a chance to encounter Primal Groudon and Primal Kyogre. Primal Pokemon are different in size, and appearance and they are much stronger than the other Pokemon. As we already said above, Primal Reversion has been observed in two Pokemon to date: the Legendary Pokemon Kyogre and Groudon, originally discovered in the Hoenn region.
Now, let’s see what’s the difference between a Normal Raid and a Primal Raid. To be honest, there is not much of a difference, except the fact that you are now challenging a much stronger Pokemon than the one in Normal Raid Battle. Primal Groudon and Primal Kyogre are tough to defeat, so we recommend using our Primal Counters guide.
The first Primal Reversion requires 400 Primal Energy.
Pokemon Go players can also access and complete (for free) three new Timed Research #377, #378, and #379.