For Pokemon GO's 7th anniversary, Niantic is hosting a special in-game event, and during the event, players can head to the shop to purchase a ticket to access the All-in-One #151 Masterwork Research. The research will not expire once someone purchases it, but it will take most players quite some time to complete the tasks, especially one in the first step. The main draw behind the Masterwork Research is to get to the second to last step, which rewards trainers with a Shiny Mew encounter.