The legendary Pokémon Entei will appear in Pokémon Sleep in late May, 2024! Entei blazes across the lands, leaving behind flames hotter than magma! What type of Sleep Styles will Entei have?

YouTube Clip - Pokémon Sleep | Entei arrives in May 2024!

Source: https://www.youtube.com/watch?v=fwbfS5fP1vg

Event Notice: Entei Research

Beginning in late May, 2024, we will be holding an event—Entei Research! You can exchange samples of Entei mane that you collect during the event for Entei Incense, which you can use to research Entei’s various sleep styles! Fire-type helper Pokémon will be particularly effective during this event, so we recommend raising your Fire-type helper Pokémon to get ready!

Fire-type helper Pokémon:
Charmander, Charmeleon, Charizard, Growlithe, Arcanine, Flareon, Cyndaquil, Quilava, Typhlosion

We’re also preparing some functions and rewards that will allow everyone—even Pokémon Sleep beginners—to research Entei’s sleep styles and befriend it more easily. More details and the event’s start date are coming in a later update. We hope you’re looking forward to this event!

Source: https://www.pokemonsleep.net/en/news/5639/

New Arrival: Entei

The Legendary Pokémon Entei has been spotted near Greengrass Isle. It may be possible to encounter it soon during sleep research. We hope you’re looking forward to this!

Entei Details

Appearing Beginning: May 20, 2024, at 3:00 p.m.
Note: Entei Incense can be used starting from the date and time above.

Appearing at:Greengrass Isle
Note: Entei may still appear during regular sleep research on Greengrass Isle or at Taupe Hollow even after the Entei Research event ends—but extremely rarely.

Sleep Type: Entei: Snoozing
Main Skill: Helper Boost (Fire)

Special Pokémon
Entei is a Special Pokémon, and you can have only one Special Pokémon on your team.
Notes: It’s possible to befriend more than one Special Pokémon, but you cannot have more than one on the same team.
For each species of Special Pokémon, the Nature and sub skills will be identical for the first one befriended by each researcher.

Source: https://www.pokemonsleep.net/en/news/5800/