This thread will be used for the upcoming “Weekly Challenges” feature in Pokémon GO.
Although not much is known about this feature, we do know that trainers can team up regardless of where they are, making this forum a good place to find friends to take on those challenges together!
You have to click in your player-face. On top you have now on the right a new menu point “Social”.
Inside there you have to create with another player a Team, and together you have to complete challenges.
But you have to be near the other player to create it, and as well to be able to play the challenges.