Pokémon GO confirmed an issue where the in-game 2025 Championship Series Cup is incorrectly allowing Shadow Pokémon on teams. The developer clarified that all live competition at the 2026 Pokémon Latin America International Championships will not allow any Shadow Pokémon, ensuring fair play during the event. Players participating in the in-game cup should expect this discrepancy until it’s fixed, while tournament matches will follow the intended rules. The announcement helps avoid confusion for both casual and competitive players ahead of the upcoming championships.
Source: Pokemon.com and Play Pokémon!
Pokémon Blog 