Following the release of Celebi in Pokemon GO, Niantic and The Pokemon Company have released a new set of avatar items from Pokemon HeartGold and SoulSilver.
The outfits are unlocked based on your Johto medal progress. You can find the outfits in the Style Shop.
Want to show your love for the Johto region? Pokémon HeartGold and Pokémon SoulSilver Trainer avatar items are now available in the Style Shop, featuring outfits that are unlocked based on your Johto medal progress. pic.twitter.com/QXInzvsUUF
— Pokémon GO (@PokemonGoApp) August 21, 2018