Pokémon GO has expanded its Weekly Challenges feature with worldwide matchmaking, making it easier for players to team up no matter where they are. The update also adds a new incentive, as completing Weekly Challenges now rewards an encounter with Tandemaus. This change removes some of the friction around finding active groups while giving players a clear reason to participate each week. For collectors still missing Tandemaus or anyone who prefers structured goals over endless grinding, the updated Weekly Challenges feel like a practical quality-of-life improvement.
Source: Official Pokémon GO blog
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