Shadow Pokémon GO has been datamined, and Team Rocket was teased in the third anniversary of Pokemon GO, which will run from June 28 to July 6.
This form of Pokémon are used in other games and not confirmed how it will work in Pokémon GO. However, the process is fairly simple.
Shadow Pokémon GO: Shadow and Purified Pokémon Coming to Pokémon GO
Shadow Pokémon are special forms that have to be 'rescued' from enemies by learning how to Purify Pokémon. There have been datamined information found by Redditor Kelven91.
You have seen these shadow forms before in Pokémon Colosseum and Pokémon XD: Gale of Darkness. It's not specified on how you'll end up purifying Pokémon, it will most likely be things that work with Pokémon GO like walking or battling with them.
Later this year, possibly around Halloween, we could see these Shadow Pokémon, Invasions and a Team Rocket quest. Recently, Niantic Labs released Harry Potter: Wizards Unite which has a few features that make the game more intricate and involved. These new Pokémon GO additions are definitely taking from the Wizards Unite franchise and making a more hands-on experience.
Though, all these features could be coming in July as well!
Photo courtesy of Niantic