Luminous Legends Y

Luminous Legends Y was the second of two events in Pokémon GO based on Kalos Legendary Pokémon, this one being for Yveltal.

Two Pokémon Spotlight Hours featuring Alolan Rattata and Marill respectively were available during this event.

The event was split into two parts. The first part contained a Global Challenge that influenced rewards and spawns in the second part.

First part
During this event Team GO Rocket Balloons could appear in a four-hour window instead of six-hour (from 00:00 to 03:59, 04:00 to 07:59 and so on), thus Trainer had a chance to encounter six balloons a day.

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

These Shadow Pokémon were released with the start of the event:

These Shiny Shadow Pokémon were released with the start of the event:

Selected Pokémon had increased spawn rates in the wild:

7-km Pokémon 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 first part of the event.

Timed Research
During this event there was a Timed Research series that was titled Luminous Legends Y in game. It was available in both parts of the event.

Global Challenge
During the event, a global challenge was available. The bonus will be applied during the second part of the event if completed.

Second part
During this event Team GO Rocket Balloons could appear in a four-hour window instead of six-hour (from 00:00 to 03:59, 04:00 to 07:59 and so on), thus Trainer had a chance to encounter six balloons a day.

Featured Pokémon
The following Pokémon were released in the second part of the event:

These Shiny Pokémon were released in the second part of the event: PS Zigzagoon PS Linoone PS Sylveon PS Sylveon PS Obstagoon

Selected Pokémon had increased spawn rates in the wild:

In addition, some Dark-type Pokémon from the first part of the event had increased spawn rates still.

7-km Pokémon 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 second part of the event.

Avatar items
These Sylveon-inspired avatar items were released with the second part of the event:

Stickers
These stickers were released with the beginning of the event: