Niantic has detailed GO Battle League: Hidden Gems for Pokémon GO. Read on below to learn more: GO Battle League: Hidden Gems update Trainers, GO Battle League: Hidden Gems is almost here! GO Battle League: Hidden Gems start date, rank resets, and end-of-Season rewards GO Battle League: Hidden Gems will start on Thursday, June 1, … Continue reading New avatar items and pose inspired by Clay revealed and will be available as rewards during GO Battle League: Hidden Gems in Pokémon GO