Season 4 - Ultra League & Premier Cup
GO Battle League shifts to Ultra League. Put your Ultra League squads to the test.
This season, The Ultra League will run along side its Premier Cup. The Ultra League Premier Cup will have the same rules as Ultra League but disallows Legendary and Mythical Pokémon.
GO Battle League will allow you to rank up against your fellow trainers in global matchmaking. Ranked rewards include items, Stardust, and special encounters.