The Raikou Research event will take place from Monday, March 25th, 2024 at 4:00 a.m. until Monday, April 8th, 2024 on Greengrass Isle in Pokémon Sleep.

Event: Raikou Research

The Legendary Pokémon Raikou appears! Repeated peals of thunder have been heard over a certain area of Greengrass Isle! Follow-up research in the area revealed bits of Raikou Mane that Raikou left behind.

According to Professor Neroli, he’ll be able to conduct research into Raikou’s sleep habits if you collect lots of Raikou Mane samples during your sleep research. You can trade these Raikou Mane samples via the Event Exchange for new items—Raikou Incense and Raikou Biscuits—to help you see Raikou’s sleep styles!

Event Outline

The Raikou Research event lasts from 4:00 a.m. on Monday, March 25 until 3:59 a.m. on Monday, April 8 on Greengrass Isle!

The Legendary Pokémon Raikou will appear during sleep research for the first time, and this two-week event is a special opportunity to concentrate on researching it!

During this event, you can collect samples of Raikou Mane to exchange via the Event Exchange for items, such as Raikou Incense and Raikou Biscuits. You can use Raikou Incense to research Raikou’s various sleep styles!
Note: Even without Raikou Incense, Raikou may appear during sleep research—but extremely rarely.

For researchers who would like to befriend Raikou, we recommend using Raikou Biscuits, which are specialized for use with Raikou only.

Also, Electric-type helper Pokémon will be particularly helpful during this event!
Note: Electric-type helper Pokémon include Pikachu, Raichu, Jolteon, Raikou, Pichu, Mareep, Flaaffy, Ampharos, and Dedenne.

In addition, you’ll be able to encounter Pokémon of different sleep types regardless of your own. Electric-type Pokémon in particular will have a greater appearance rate.

During this event, you’ll be able to take on two sets of limited-time missions, Week 1 Missions and Week 2 Missions, to earn samples of Raikou Mane as rewards!
Week 1 Mission period: Monday, March 25 at 4:00 a.m. to Monday, April 8 at 3:59 a.m.
Week 2 Mission period: Monday, April 1 at 4:00 a.m. to Monday, April 8 at 3:59 a.m.

Please see below for more details about this event.

Event Exchange

Exchange Period: Monday, March 25, at 4:00 a.m. to Thursday, April 11, at 3:59 a.m.

This is a shop where you can exchange samples of Raikou Mane for the following items.
• Raikou Incense
• Raikou Biscuit
• Main Skill Seed
• Thunder Stone
And more!

• Also, a few Raikou Incense and Raikou Biscuits will be added at a slightly lower exchange rate in the second week of the event. Keep an eye out for these during the last stretch of the event!

What is Raikou Incense?

• An incense adored by Raikou.
• If you set this on the stump labeled “Incense” next to your tent on the home screen before you begin sleep tracking, you will for sure be able to meet Raikou during your next sleep research.
• You can have up to one in your bag’s items pocket at a time.
Note: Incense that you have set still counts as being inside your bag’s items pocket until it’s consumed during sleep research.
• It can be used starting from the time Raikou begins appearing: Monday, March 25, at 3:00 p.m.
• It can also be used after the event has ended.

What are Raikou Biscuits?

• These can be used during sleep research within the event period and only with Raikou.
• One Raikou Biscuit increases Raikou’s friendship points by 6.
• After the Event Exchange closes, any Raikou Biscuits that you have will be automatically converted into Great Biscuits.

Raikou Mane

• During the event, Raikou will leave behind bits of its mane, which you can collect as samples.
• You can check to see how many samples you have at the Event Exchange (the samples won’t go into your bag’s items pocket).
• After the event ends, you can still trade samples of Raikou Mane until the Event Exchange closes. Once the exchange period ends, any remaining samples of Raikou Mane will be lost.

How to Get Samples of Raikou Mane

■ Sleep Research on Greengrass Isle
• This is the main way you can get samples of Raikou Mane. You can get them during one sleep research session per day.
Note: You cannot get any during the second sleep research of the day.
• The number of samples of Raikou Mane you can get depends on the species of Pokémon and the sleep styles you find them in.
• Electric-type Pokémon that you research will give you a greater number of samples of Raikou Mane.

■ Limited-Time Missions
• You can get samples of Raikou Mane by completing limited-time missions.

■ Raikou Research Bundles Vol. 1 and Raikou Last Chance Bundles Vol. 1
Please see news about the bundles that will be posted at a later date for details.

■ Research Community
• In rare cases, you can get samples of Raikou Mane from other researchers in your research community who are participating in the same event.
• The higher your closeness with each researcher, the more likely you are to receive samples of Raikou Mane from them through the research community.
• The following Limited-Time Special Gift will be distributed only to those who cannot participate in the research community.
Note: Users who can access the Research Community screen are not eligible for this gift.

Limited-Time Special Gift

• You will receive 50 samples of Raikou Mane at the beginning of the first week (March 25) and at the beginning of the second week (April 1)!
Notes: This applies to players who logged on before 2024/04/09 23:00.
If your gift has not yet arrived, please restart the app, and then check your Gift Box.

How to Progress in the Event

Participating in the event is easy! Simply press the “Sleep” button before going to sleep during the event to track your sleep. A variety of event-related effects will trigger during your sleep research.
Note: This event’s bonuses can be triggered on Greengrass Isle.

Bonuses

— All Days (3/25−4/7) —
• Each time an Electric-type helper Pokémon brings you ingredients, it will have one extra.
• The chance of an Electric-type helper Pokémon’s main skill being triggered will be multiplied by 1.5.
• The Snorlax on Greengrass Isle will have Grepa Berries (Electric type) set as one of its favorite Berries.
• A few Pokémon of different sleep types will appear during sleep research regardless of the researcher’s sleep type for that day.
• Certain Pokémon will be more likely to appear during sleep research.

Note: Electric-type helper Pokémon
Raikou, Pikachu, Raichu, Jolteon, Pichu, Mareep, Flaaffy, Ampharos, Dedenne
Pokémon That Are Easier to Encounter during the Event

During the event, the following Pokémon are more likely to appear!
Slightly Greater Appearance Rate
Pikachu, Raichu, Jolteon, Raikou, Pichu, Mareep, Flaaffy, Dedenne

Notes about the Raikou Research Event

Important Notes
• Each day of the Raikou Research event rolls over at 4:00 a.m.
• Event bonuses apply only to sleep data tracked on Greengrass Isle.
• After the event ends, Raikou may still appear during sleep research conducted on Greengrass Isle—but extremely rarely.
• Raikou Incense can still be used after the event has ended.
• Because Raikou is a Special Pokémon, you can have only one Raikou on your team.
• It’s possible to befriend more than one Special Pokémon, but you cannot have more than one Special Pokémon on the same team.
• For all Special Pokémon, the first befriended Special Pokémon’s Nature and sub skills are identical for all researchers.
• Event bonuses apply only to sleep tracking that begins within the event period.
• If you wait to report sleep data tracked before the event begins and select “Review Later” during the event, event bonuses will not be applied.
• If you wait to report sleep data tracked during the event and select “Review Later” after the event has ended, event bonuses will be applied.
• Event bonuses do not apply to sleep tracking during the tutorial.

Source: https://www.pokemonsleep.net/en/news/5213/