Dragon Week

Dragon Week was an event in Pokémon GO. It was the first part of Ultra Unlock event series.

Featured Pokémon
Selected Dragon-like Pokémon had increased spawn rates in the wild:

Moreover, these Shiny Pokémon were released with the start of the event. PS Deino (633) PS Zweilous (634) PS Hydreigon (635)

7-km Eggs obtained during the event would hatch more of these 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.

Timed Research
During this event there was a Timed Research campaign that was titled Ultra Unlock 2020 in game.

Makeup Timed Research
Due to a technical issue causing some players' Timed Research to disappear before the end of the event, a new Timed Research was available from August 8:00 a.m. to August  10 p.m. local time. The requirements were a little different but the rewards were the same.

Trivia

 * This event was titled Ultra Bonus Unlock 2020 - part 1 in the Today View page in game.
 * The stages of the Special Research were not numbered.