The Legendary Pokémon Raikou has been spotted near the Greengrass Isle in Pokémon Sleep. It will begin appearing starting on March 25th, 2024 at 3:00pm.

New Arrival: Raikou

It seems the Legendary Pokémon Raikou has been spotted near Greengrass Isle. It may be possible to encounter it during sleep research soon. Also, Raikou’s main skill is a new one: Helper Boost (Electric)! We hope you’re looking forward to this!

Raikou Details

Appearing Beginning: March 25, 2024, at 3:00 p.m.
Note: Raikou Incense can be used starting from the date and time above.

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

Sleep Type: Raikou: Snoozing

Main Skill: Helper Boost (Electric) (New Main Skill)

• Your team of helpers, including Raikou, will instantly gather a bonus amount of Berries and ingredients based on the number of different species of Electric-type Pokémon on your team and the level of the Helper Boost (Electric) skill.

• The more different species of Electric-type Pokémon on your team, the greater the effect of this skill.
The following are examples of different teams of Pokémon eligible for this benefit.
Example 1: A team with 5 different species of Electric-type Pokémon:
Raikou, Raichu, Dedenne, Jolteon, Ampharos
Example 2: A team with 4 different species of Electric-type Pokémon:
Raikou, Raichu, Raichu, Jolteon, Ampharos
Example 3: A team with 5 different species of Electric-type Pokémon:
Raikou, Raichu, Pikachu, Jolteon, Ampharos
Note: Pikachu (Halloween) and Pikachu (Holiday) count separately from Pikachu.

• Multiplication Example: If Raikou’s main skill Helper Boost (Electric) is Lv. 6 and there is a team of 5 different species of Electric-type Pokémon, you instantly get ×11 the usual help from all Pokémon on your team, including Raikou. This is because main skill Lv. 6 yields a base value of 5, plus a bonus of 6 based on the number of different species of Electric-type Pokémon on your team.

Note: The special Pikachu that appears when you link your Pokémon GO Plus + does not count towards this main skill.

Special Pokémon

Because Raikou is a Special Pokémon, you can have only one Raikou on your team.
Notes: 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.

Source: https://www.pokemonsleep.net/en/news/5215/