In Pokemon Let’s Go Pikachu and Let’s Go Eevee, the main Pokemon Trainer and their Partner Pokemon can wear various types of clothing. A set of clothes is often given as a reward for completing a small task. For the Trainer, a set includes a hat, shirt, pants, shoes, and a bag. For the Pokemon, a set includes a hat and clothes.
Pallet Town from your Rival's sister after the intro adventure.
Vermilion City from the Sailor who checks your ticket before going on the S.S. Anne.
Lavender Town from the old lady in the lobby.
Route house between Route 15 and Fuchsia City. Reward from Professor Oak's assistant after capturing 50 different species of Pokemon.
Fuchsia City's Safari Zome from the Safari Zone Warden after retrieving his gold teeth from Route 19.
Saffron City from Officer Jenny after defeating Team Rocket in Silph Co.
Vermilion City from the Pokemon Fan Club Chairman if your partner Pokemon is a Pikachu.
Vermilion City from the Pokemon Fan Club Chairman if your partner Pokemon is an Eevee.
Team Rocket Set
Team Rocket HQ underneath Rocket Game Corner in Celadon City. Speak with undercover cop near the entrance to receive the set.
Pokemon Road from Jesse and James after becoming Pokemon League Champion.
Additional accessories, glasses, and hats can be purchased for the Partner Pokemon from the Celadon City Department Store. Accessories can be placed on the Pokemon’s ears, back, chest, and tail.