Pokémon Sleep has announce that Version 2.4.0 will be released on January 16th, 2025, and it adds New Features and includes Bug Fixes. To update to the app’s new version, maintenance will be conducted from January 15th, 2025 at 23:30 to January 16th, 2025 at 4:00.

Maintenance and Version 2.4.0 Update

To update to the app’s new version, maintenance will be conducted in the following time period.

Maintenance Period:
Starts: 2025/01/15 23:30
Ends: 2025/01/16 04:00

New Features

■ Preparation for new events
For details, please see the event announcements posted at a later date.

■ Preparations to add new Pokémon
Please wait for more details.

■ Addition of a new Relaxing Sound, “Jigglypuff’s Song”

Balance Adjustments

■ Adjustments to certain helper Pokémon’s helping stats
• Raticate
• Frequency shortened slightly

• Kangaskhan
• Frequency shortened slightly
• Carry limit increased

• Heracross
• Frequency shortened slightly

• Wobbuffet
• Main skill chance increased slightly
• Carry limit increased

• Slaking
• Frequency shortened slightly
• Carry limit increased

Game Contents

■ Addition of a new Pokémon search parameter
You can now search by Specialty when searching for Pokémon in your Pokémon Box.

Other

■ Capacity limit for the bag’s items pocket unlocked
• Items pocket max capacity: 800 → 1,000

■ Some texts adjusted or unified

■ Other small bug fixes and adjustments

Source: https://www.pokemonsleep.net/en/news/323233353030363738363936323731383733/