Pokemon Go’s global Go Fest has arrived, and this year’s event is a big one. For the first time in the game’s history, all players who log in during the festivities will receive access to a new Special Research that leads to an encounter with the mythical Pokemon Zeraora. That’s not all that players can look forward to this weekend. Mewtwo’s Mega-Evolved forms are also making their debut, and different wild Pokemon and Raid bosses will appear throughout the weekend…