When there’s a gap in your busy schedule, return to the Wedgehurst train station–if you’ve forgotten, it’s directly in front of the town entrance via Route 1. Inside, you’ll learn that the train from the Isle of Armor has alighted. Go over to meet a new character: Klara in Sword or Avery in Shield.
A strange-looking Slowpoke will come wandering from the train. This is a Galarian Slowpoke, which is a brand new Pokémon native to the Isle of Armor. Apparently, they’re a nuisance at train stations, so you’re asked to try and catch it. Well, here goes!
The Slowpoke will be Level 12. If you’re pretty far into the game, you may want to dial your team down. Or just use False Swipe!
Afterwards, Klara or Avery will compliment you on your skills, before departing for the Isle of Armor. If you have the Armor Pass from purchasing the Expansion Pass, you can show it to the staff member next to the ticket gates to travel to the Isle of Armor yourself.