Pokémon Sleep will undergo scheduled maintenance from June 24 to June 25 as the game prepares to roll out version 3.6.0. The update is set to introduce new features, balance adjustments and additional improvements aimed at refining the overall gameplay experience. During the maintenance period, players will be unable to access certain game functions while the new version is implemented. As with previous major updates, version 3.6.0 is expected to include a mix of quality-of-life enhancements and gameplay changes designed to support future content. Pokémon Sleep users should make note of the maintenance window and update the app once the new version becomes available.
Source: Official Pokémon Sleep news and PokemonSleep.net