Catch Mastery: Ghost

Catch Mastery: Ghost was the first Catch Mastery event in Pokémon GO with a 10-part Timed Research available on October, 2020. This event is a part of Halloween 2020. The whole research required catching 69 Drifloon to complete. There were total of 18 Drifloon encounters. A total of 80 Gengar Mega Energy could be obtained for completing it.

Field Research event tasks
Additionally, there were extra Field Research task exclusively for the duration of the event.