How To Beat Sierra August 2025. You will need to beat sierra and fellow leaders arlo and cliff if you want to take on team go boss giovanni in june 2025. In pokémon go, you’ll need to take down the team go rocket leaders cliff, siera, and arlo.

This particular shadow squirtle will also be the pokemon users are rewarded. This month, september 2025, sierra decided to use various shadow pokémon that cover their own weaknesses throughout the battle.