Mega Raid Challenge

Mega Raid Challenge is an event in Pokémon GO that occurs in the first week of September 2020, as part of Mega September event series.

Features
Following Friendship attack bonuses were applied in Raids during this event:

Featured Pokémon
Mega Pidgeot will be unlocked if Trainers win 2 million Mega Raids.

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

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

Trivia

 * The official blog made an announcement of shiny Lotad, which is done for new-released Shiny Pokémon. However, shiny Lotad had already been released in March 2019 Limited Research.