It appears that the Legendary Pokémon Mewtwo has been discovered in an unexplored realm in Greengrass Isle in Pokémon Sleep!
Mewtwo is a very cautious Pokémon, but as we head deeper into the unexplored realm, we may get to encounter rare sleep styles that wouldn’t normally be seen.
It seems cooperation from the Mythical Pokémon Mew is key to advancing the survey of the unexplored realm, on account of its curiosity about Mewtwo’s rare sleep styles. Advance the survey of the unexplored realm with Snorlax’s Drowsy Power and the combined strength of Mew and researchers worldwide.
Date, Time and Research Areas
Event Week One: Monday September 14th at 4:00 a.m. to Monday September 21st at 3:59 a.m.
Event Week Two: Monday September 21st at 4:00 a.m. to Monday September 28th at 3:59 a.m.
Event Areas: Greengrass Isle, and Greengrass Isle (Expert) only. You cannot select other areas during this event.
Mission Period Week One: Monday September 14th at 4:00 a.m. to Monday September 28th at 3:59 a.m.
Mission Period Week Two: Monday September 21st at 4:00 a.m. to Monday September 28th at 3:59 a.m.
Event Exchange Period: Monday September 14th at 4:00 a.m. to Thursday October 1st at 3:59 a.m. Once the event ends, the event exchange can be used in all areas.
Event Overview
This two-week event is a special opportunity to conduct a survey of the unexplored realm within Greengrass Isle and trace the rare sleep styles of Mewtwo.
During the event, the average Drowsy Power of researchers worldwide will be combined with your own Drowsy Power to accumulate Event Drowsy Power. It seems that Event Drowsy Power will accumulate as you research the unexplored realm, allowing you to advance deep into the heart of the unexplored realm.
Also during the event, Legendary Pokémon Mewtwo is more likely to appear, and a bonus will be applied to Drowsy Power if you have Mew, or Mewtwo on your team while you sleep.
You’ll also only be able to get Mewtwo DNA from sleep research while the event is in progress. You can trade Mewtwo DNA samples via the Event Exchange for new items Mewtwo Incense and Mewtwo Biscuits in order to help you see Mewtwo’s sleep styles.
In addition, Very Big Mago Berries that are larger than usual and provide considerable Strength have been discovered in the unexplored realm. It also seems that Mew, Mewtwo, and Psychic-type Pokémon can bring you more Berries!
Bonuses
Bonuses will vary during the event.
Note: If more than one bonus on Drowsy Power is triggered, the larger bonus will be applied.
All Days of the Event
The following bonuses will occur on all days of the event:
Week 1 Bonuses (September 14th to September 20th)
The carry limit of all helper Pokémon will increase by 8.
Main skill levels of Psychic-type helper Pokémon will be boosted by 2 when they trigger.
Week 2 Bonuses (September 21st to September 27th)
A big Snorlax will appear, and it can be raised starting at a certain Strength
If you have Mewtwo on your team while you sleep, Drowsy Power will be multiplied by 1.3
The carry limit of all helper Pokémon will increase by 15.
Main skill levels of Psychic-type helper Pokémon will be boosted by 5 when they trigger.
Very Big Mago Berries
During the event, each time a helper Pokémon brings you Berries as it usually would, it may bring extra special Mago Berries that contain more Strength than usual. Other than discovering more as you advance deeper into the heart of the unexplored realm, you may be brought different amounts depending on the helper Pokémon. Please see the following order of which brings the most.
Mew, and Mewtwo (brings the most)
Psychic-type helper Pokémon
Other helper Pokémon
Note: The effects of subskill Berry Finding S will not be applied, and Berries cannot be given to Snorlax while Sneaky Snacking.
Drowsy Power During the Event
Event Drowsy Power will accumulate during this event. Event Drowsy Power is calculated by adding Global Drowsy Power, which is based on the average Drowsy Power of all researchers playing Pokémon Sleep, to your Personal Drowsy Power.
When you accumulate a certain amount of Event Drowsy Power, your event rank goes up, allowing you to advance deeper into the heart of the unexplored realm. Additionally, each time your rank increases, you can receive various rewards, such as samples of Mewtwo DNA or a Handy Candy M.
Global Drowsy Power
Global Drowsy Power is calculated based on the average Drowsy Power of all researchers worldwide from two days prior (taking researchers’ time zones into account), and as the event progresses, the value will continue to grow.
Global Drowsy Power for Monday September 14th and Tuesday September 15th will be calculated based on the Drowsy Power of all researchers on Saturday September 12th and Sunday September 13th, respectively.
Event Ranks
There are a total of 15 event ranks, and the maximum event rank for the first week of the event is Rank 8.
In the second week of the event, this event rank cap will be unlocked and more luxurious rewards will be added.
Notes on Event Drowsy Power
Event Drowsy Power accumulated in the first week will carry over to the second week.
During the second sleep research of the day, only your Personal Drowsy Power will be added to your Event Drowsy Power. Global Drowsy Power will not be added.
Sleep data that was entered manually will not be included.
You can receive event rank rewards until October 1st, 2026, at 3:59 a.m.
Expert Mode Bonuses
If you participate in the event in an expert area, the bonuses will change as follows:
If you participate in the event in an expert area, Snorlax’s main favorite Berry for the week will be Mago Berries (Pyshic type), and Snorlax’s sub-favorite Berries will be random.
Featured Pokémon
The following Pokémon are more likely to appear during this event:
Greater Appearance Rate
Slightly Greater Appearance Rate
Pokémon You Can Encounter in Each Area
Greengrass Isle: Mewtwo, Natu, Xatu, Espeon, Wobbuffet, Wynaut, Munna, and Musharna
Greengrass Isle (Expert): Mewtwo, Natu, Xatu, Espeon, Ralts, Kirlia, Gardevoir, Munna, and Musharna
Mew Friendship Points
If a researcher who has yet to befriend Mew befriends Mew during this event, the amount of friendship points accumulated will carry over to the next time. For example, if Mew’s friendship points were at 20 and Mew’s friendship points max out during the event, the next time you encounter Mew, their friendship points will be at 20.
Mewtwo Details
Mewtwo is a Special Pokémon. You can have only one Special Pokémon on your team.
As an exception, Latias and Latios can be on the same team. It is possible to befriend more than one Special Pokémon.
The Nature and sub skills of each species of Special Pokémon will be identical for the first one befriended by each researcher.
Mewtwo DNA
You can exchange Mewtwo DNA for other items at the Event Exchange.
You can check to see how many you have at the Event Exchange. These won’t go into your bag’s items pocket.
You can obtain these only during the event.
After the event ends, you will still be able to exchange Mewtwo DNA until the Event Exchange closes.
You will lose any remaining Mewtwo DNA once the exchange period ends.
How to Get Mewtwo DNA
Sleep Research in the Event Areas: This is the main way to get Mewtwo DNA. You cannot get any of these items during the second sleep research of the day. The number of Mewtwo DNA samples you can get depends on the species of Pokémon and the sleep styles you find them in. Psychic-type Pokémon that you research will give you a greater number of samples of Mewtwo DNA.
Limited-Time Missions: You can get samples of Mewtwo DNA by completing limited-time missions.
Event Rank Rewards: You can get samples of Mewtwo DNA by raising your event rank to certain levels.
Mewtwo Research Bundles Vol. 1 and Mewtwo Last Chance Bundles Vol. 1: For sale in the in-game shop.
Research Community: In rare cases, you can get samples of Mewtwo DNA from other researchers in your Research Community who are also participating in the same event. The higher your closeness with a researcher, the more likely you are to receive samples of Mewtwo DNA from them.
Limited-Time Special Gift: A Limited-Time Special Gift will be distributed only to those who do not have the Research Community button on their Main Menu. The following items will arrive in your Gift Box at the beginning of the event’s first week and again at the beginning of the second week – Mewtwo DNA ×70. This applies to players who log in during the event period. Researchers who have the Research Community button on their Main Menu are not eligible to receive this gift. If your gifts haven’t arrived yet, please restart the app and then check your Gift Box.
Event Exchange and Items
Event Exchange
You can exchange samples of Mewtwo DNA for the following items:
Mewtwo Incense
Mewtwo Biscuits
Main Skill Seed
And more
Also, a few Mewtwo Incense and Mewtwo Biscuits will be added at a slightly lower exchange rate in the second week of the event.
Notes about Pokémon Incenses
If you set one 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 the applicable Pokémon during your next sleep research. Incense you have set still counts as being inside your bag’s items pocket until it’s consumed during sleep research.
Notes about Mewtwo Incense
They will remain in your bag’s items pocket and can also be used after the event has ended.
You can have up to one Mewtwo Incense in your bag’s items pocket at one time.
Mewtwo Biscuits
These biscuits can only be used with Mewtwo during the event.
One Mewtwo Biscuit increases Mewtwo’s friendship points by 6.
Any Mewtwo Biscuits you have will be automatically converted into Great Biscuits on Saturday October 3rd at 20:00 p.m..
Notes on the Event
Important: Each day of the event rolls over at 4:00 a.m.
Event bonuses apply only to sleep data tracked during the event.
If you wait to report sleep data that was tracked before the event began by selecting “Review Later” during the event, event bonuses will not be applied.
If you wait to report sleep data that was tracked during the event by selecting “Review Later” after the event has ended, event bonuses will be applied.
Event bonuses do not apply to sleep tracking during the tutorial.
Event bonuses will not raise main skill levels beyond max level. The value of the main skill displayed on the Pokémon details screen is the value before the bonus effects apply. Also, for Pokémon that were already on your team before the event started, their main skill may not include the bonus effect the first time it triggers during the event, in some cases.
If overlapping events trigger more than one of the same type of bonus, the larger bonus will be applied.
If there are multiple bonuses from different events that increase your chance of encountering Shiny Pokémon and apply to the same Pokémon, the bonus with the largest effect will be applied.
