Team GO Rocket never rests, and they appear to be up to something big. Their leaders are preparing to be more active than ever on Saturday, March 7, from 2:00 p.m. to 5:00 p.m. in your local time zone, and they’ve been seen with Shiny Shadow Pokémon. Defeating Team GO Rocket Grunts and Leaders will earn you twice the usual Stardust during this time. Furthermore, Poison- and Dark-type Pokémon will appear more frequently in the wild, including the fearsome Disaster Pokémon, Absol. Shiny Skorupi have also been sighted in the wild for the first time.

In fact, your next encounter with a Shadow Pokémon may be a little different from what you’re used to, whether you’re fighting a Team GO Rocket Grunt or one of their leaders. Whatever Team GO Rocket is doing seems to be making these poor Pokémon stronger as long as they remain Shadow Pokémon.

Shadow Pokémon now deal more damage with their Fast Attacks and Charged Attacks, but they also take more damage when attacked. Powering up a Shadow Pokémon and teaching a Shadow Pokémon a second Charged Attack now cost less Stardust and Candy. And Legendary Shadow Pokémon you save from Giovanni are now more powerful.

That’s not all, Trainers. During certain time periods, such as the event on Saturday, March 7, Shadow Pokémon might be able to forget the Charged Attack Frustration by learning a different Charged Attack via a Charged TM. But if you purify the Shadow Pokémon afterward, it will still learn Return, replacing the attack learned from the Charged TM.

Will you continue to purify the Shadow Pokémon you rescue from Team GO Rocket, or will you battle with these Pokémon yourself? Whatever you do, don’t forget to turn on your in-game music while you’re battling Team GO Rocket—their music will be playing!