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Pokemon Sleepis giving players the chance to catch Entei, the second of Johto’s legendary trio in a two-week event! The developers have updated several aspects of the Raikou event to make things easier this time around, so players who had trouble catching Raikou will have an easier time raising their Snorlax high enough to encounter Entei.
After this event, Entei will still be available to catch, albeit very rarely. These two weeks will be your best chance at catching the Volcano Pokemon reliably, and potentially even catching a shiny one if you get very lucky.

Event Information
This event will run until June 3 and to take part youmust be on Greengrass Isle.By conducting research there, you will get Entei Mane from the Pokemon you study.
Unlike the Raikou event, youcannotget Entei Mane from other players via the Research Community tab.

During the event,Fire-type Pokemon will have their skills triggered more often,so you should have them on your team. They will also appear more often while you research.
This event will overlap with theGood Sleep Dayevent from May 22 to May 25, which you can use to further increase your sleep score.

On the final Sunday of the event, June 2, your sleepscore will be multiplied by 1.5
How To Get Entei
Entei can be encountered on Greengrass Isle or Taupe Hollow, but youwill want to do research on Greengrass Isle to be able to do quests and use the Event Exchange.
You will need 30 friendship points to befriend Entei, and you can get Entei Biscuits in the Event Exchange.
Since Entei is a legendary Pokemon,you can only have one on your team at a time, though you can catch multiple.
Event Missions
During the event, you’ll be able to complete special quests to receive Entei Mane, which can be accessed from the Missions menu.
15
25
40
Give out 15 Biscuits
50
Use 7 incenses
Stick to your bedtime 3 times
These can be used to get items such as Entei Biscuits and Entei Incense from theEvent Exhange.
The exchange will restock with cheaper incense and biscuits during the second week of the event, so it’ll be good to conserve your mane for that.