Pokémon Café Mix will be relaunched as Pokémon Café ReMix in late October. A server maintenance will be carried out shortly before this update, during which the game will not be playable. Precise details of the update and server maintenance schedule will be announced in mid-October. The user data for Pokémon Café Mix will be transferred to Pokémon Café ReMix during the server maintenance process.
Ahead of this relaunch, the Pokémon Café Mix app will be receiving an update on October 13, 2021, at 11 a.m. JST. This update will remove offline play functionality, and moving forward an Internet connection will be required when playing the game. While the stated reason for this change is to avoid potential data inconsistency issues with the data transfer to Pokémon Café ReMix that could result from offline play, this change is apparently permanent, and Pokémon Café ReMix will not support offline play.