Entei, the Legendary Pokémon known for its majestic appearance and fiery nature, has made its debut in Pokémon Sleep through a special two-week long event. The event takes place on Greengrass Isle, where increased volcanic activity has been reported, hinting at the presence of Entei in the area. Researchers have discovered bits of Entei Mane scattered around the volcano, offering a unique opportunity to study Entei's sleep habits.

Professor Neroli is leading the research into Entei's sleep patterns and behavior, with the help of Pokémon trainers collecting Entei Mane samples during their sleep research. These samples can be traded via the Event Exchange for special items like Entei Incense and Entei Biscuits, which provide insights into Entei's different sleep styles.

The Entei Research event kicks off on Monday, May 20, at 4:00 a.m., and runs until Monday, June 3, at 3:59 a.m. During this time, players can encounter Entei in their sleep research sessions on Greengrass Isle. Entei, a Special Pokémon with the Sleep Type of Snoozing and main skill of Helper Boost (Fire), is a rare and valuable addition to any Pokémon team.

In addition to Entei, several other Fire-type Pokémon like Charmander, Vulpix, and Growlithe have increased appearance rates during the event. Special bonuses and rewards are also available, including boosts to Fire-type helper Pokémon's main skill levels and the chance to earn samples of Entei Mane through limited-time missions.

Players can enhance their experience by using Entei Incense and Biscuits during sleep research sessions. Entei Incense guarantees an encounter with Entei, while Entei Biscuits increase Entei's friendship points. These items can be exchanged for Entei Mane and other rewards at the Event Exchange.

It's important to note that the event bonuses and effects only apply to sleep data tracked on Greengrass Isle. After the event ends, Entei may still appear during sleep research sessions on Greengrass Isle or Taupe Hollow, albeit rarely. Players can continue to use Entei Incense even after the event concludes.

Overall, the Entei Research event in Pokémon Sleep offers a unique opportunity to delve into the mysterious world of Entei's sleep patterns and behavior. With special items, rewards, and bonuses available, trainers can immerse themselves in the captivating experience of studying this legendary Pokémon.