Primal Reversion

Primal Reversion is an additional, temporary form specifically for Kyogre and Groudon, similar to Mega Evolution. They have greatly increased Combat Power, but their HP remains the same. Primal Form Pokémon can be assigned as a Buddy Pokémon and used to battle in raids and Gyms or Trainer Battles (including against other players, Team Leaders, Team GO Rocket members, and Challengers in events). However, they cannot be deployed to defend Gyms, traded, powered up or used in GO Battle League matches outside of specific events. When a Pokémon is in its Primal Form, the Trainer receives bonuses.

Reverting a Pokémon to Primal Form
In order to undergo Primal Reversion, the Trainer needs Primal Energy of specific Pokémon.

A Pokémon will remain in their Primal Form for 8 hours, after which it will enter rest period. Only one of the Trainer's Pokémon can be in Primal Form at any particular time. If another Pokémon is undergone Primal Reversion, the previous Primal Pokémon will change back to standard form and enter rest period. Pokémon can also go Primal Reversion in a raid lobby or Trainer Battle preparation screens.

Each Primal Pokémon for first time is registered to the Mega Pokédex.

Primal Energy
Primal Energy is a consumable resource that is similar to Pokémon Candy and Mega Energy, as each Pokémon species has specific Primal Energy. Unlike Candy, each individual type of Primal Energy has a limit of 9999 in Trainer collection.

Primal Energy for a particular species can be received by battling that specific Pokémon in Primal Raids, a special Tier of Raid Battles, or completing research tasks. Completing a Primal Raid in a shorter time would award more Primal Energy, which is given upon completion of the raid and does not require a catch.

Undergoing Primal Reversion for the first time costs a high amount of Primal Energy. That single Pokémon does not require Primal Energy again to undergo Primal Reversion subsequent times if its rest period is over. Primal Energy can be used to skip the rest period. The Primal Energy cost will gradually decrease along with the rest period drops. Other Pokémon of the same species still requires full cost to undergo Primal Reversion.

Primal Level and bonuses
Undergoing Primal Reversion on a Pokémon progresses that specific Pokémon's Primal Level and unlocks increasing bonuses.

Primal Kyogre boost the attack power of Water-, Electric- and Bug-type attacks in Raid Battles. Primal Groudon boost the attack power of Fire-, Grass- and Ground-type attacks in Raid Battles.

Setting Primal Kyogre as Buddy Pokémon grants additional XP and Candy when catching Water-, Electric-, and Bug-type Pokémon. Setting Primal Groudon as Buddy Pokémon grants additional XP and Candy when catching Fire-, Grass-, and Ground-type Pokémon.

Higher Primal Level reduces the Primal Energy cost to skip the rest period.

List of Primal Reversions


Regular =

Shiny=

PS Kyogre PS Groudon Portrait=

Portrait shiny= PS Kyogre (n) PS Groudon (n)

Regular and Primal Pokémon comparison
The required amount of Primal Energy varies according to the rest period in hours.

Trivia

 * Primal Reversion was released on February, 2023 at the start of Pokémon GO Tour: Hoenn - Las Vegas.