Galar’s Slowpoke will be making a lot of appearances in the “A Very Slow Discovery” event when he makes his debut in Pokemon go.
Because Slowpoke’s Psychic-type regional variant will be the protagonist, Niantic has also added one of their regional evolutions with Galar’s Slowpoke.
Galar’s Slowbro is a Poison / Psychic type that has quite a unique evolution mechanic in Pokémon Sword and Shield, which requires you to collect Galanuez Branches and weave them into a Galanuez Bracer with the help of a non-playable character. But Niantic has changed its evolution mechanic to be more in line with the gameplay of Pokemon go.
Instead of using a special item, you must catch 30 Poison-type Pokémon while the Galar Slowpoke you want to evolve is set as your friend. Once you have captured all 30 types of poison, you can use 50 Slowpoke Candies to evolve them.
With this change, it’s likely that once Galar’s Slowking is added at some point in the future, you’ll need to catch 30 Psychic-type Pokémon instead.