Halloween 2020

Halloween in 2020 was the fifth Halloween event in Pokémon GO.

Featured Pokémon
The following Pokémon were released with the start of the event:

Selected Ghost-type and Dark-type Pokémon had increased spawn rates in the wild and from Incense or Lure Modules:

These Shiny Pokémon were released with the start of the event: PS Gengar PS Gengar PS Sableye PS Spiritomb

There were also three chances per day to be photobombed by these Pokémon:

5-km Eggs obtained during the event would hatch Halloween-themed Pokémon:

The following Raid Bosses were available for a time of this event:

Field Research event tasks
There were several Field Research tasks exclusively for the duration of the event.

Special Research
Spiritomb and Galarian Yamask were available in this year Special Research.

Timed Research
During this event there was a Timed Research series that was titled Mega Gengar in game. Only Trainers who completed Timed Research during Mega Buddy Challenge would access this. A total of 260 Gengar Mega Energy could be obtained for completing it.

Catch Mastery: Ghost
On October from 8:00 a.m. to 10:00 p.m. local time, event-exclusive Timed Research was available.

Alolan Marowak Raid Day
This event included a Raid Day on October from 11:00 a.m. to 5:00 p.m. local time, featuring Alolan Marowak with exclusive move Shadow Bone. Five Raid Passes were available during this event when spinning Gyms.

An event box was available during this mini-event.

Day of the Dead
On November from 10:00 a.m. to  11:59 p.m. local time, the game will be celebrating the Day of the Dead for the first time with a special event for Trainers in Latin America.

Trivia

 * This event was first mentioned in the blog about Mega September.