Pokémon Sleep has announced 2 bundles to promote the Raikou event.

Biscuits and Raikou Mane available in Raikou Research Bundles Vol. 1 and Raikou Last Chance Bundles Vol. 1

To accompany the Raikou Research event, Raikou Research Bundles Vol. 1 (S, M, and L) will be available beginning 2024/03/24 00:00!

Raikou Research Bundles Vol. 1 (S, M, and L) include items that are good for befriending and raising Raikou, such as a Good Camp Ticket, samples of Raikou Mane, and Raikou Candies.

Samples of Raikou Mane—which are included in each bundle—can be traded at the Event Exchange for items such as Raikou Incense and Raikou Biscuits. You can use those items to further your Raikou research!

Bundle M includes a Good Camp Ticket. If you use a Good Camp Ticket, an additional Pokémon will appear during your sleep research, so you’ll be able to get more samples of Raikou Mane than usual from sleep research during this event!
Note: The Good Camp Ticket will attract only one additional Pokémon per day.

Also, for the second week of the event, Raikou Last Chance Bundles Vol. 1 (S and M) will be available beginning 2024/04/01 00:00! We hope they help you in your final effort during the second week of the event!

Bundle Details - Raikou Research Bundles

Availability period: 2024/03/24 00:00 to 2024/04/08 23:59

Bundles:
Raikou Research Bundle Vol. 1 S (250 diamonds)
• Poké Biscuit ×4
• Friend Incense ×1
• Raikou Mane ×25
Note: Up to three available per user.

Raikou Research Bundle Vol. 1 M (1,200 diamonds)
• Great Biscuit ×6
• Good Camp Ticket ×1
• Raikou Candy ×30
• Raikou Mane ×100
Note: One available per user.

Raikou Research Bundle Vol. 1 L (3,000 diamonds)
• Great Biscuit ×15
• Friend Incense ×4
• Dream Cluster M ×3
• Raikou Candy ×60
• Raikou Mane ×200
Note: One available per user.

Raikou Last Chance Bundles

Availability Period: 2024/04/01 00:00 to 2024/04/08 23:59

Raikou Last Chance Bundle Vol. 1 S (600 diamonds)
• Poké Biscuit ×15
• Raikou Mane ×70
Note: One available per user.

Raikou Last Chance Bundle Vol. 1 M (1,500 diamonds)
• Great Biscuit ×12
• Raikou Mane ×140
Note: One available per user.

Source: https://www.pokemonsleep.net/en/news/5265/