On August 30, 2017, new update data for Pokémon Super Mystery Dungeon became available. Please take a moment to download and install this update while your Nintendo 3DS family system is connected to the Internet.
Notes:
- This update must be applied in order to use the game’s Internet features.
- Save data will still be available for use after downloading the update.
- After downloading the update, please do not delete the update data. Update data can be viewed in the “Downloadable Content” area of the Data Management menu.
What to Do:
- Perform a system update to ensure you have the most up-to-date version.
- Download the Pokémon Super Mystery Dungeon Update from the Nintendo eShop.
- Once the download is complete, the update will automatically be applied. The newest version number will be displayed on the title screen.
Version 1.0
- Support for the Meowth Theater feature has ended.
Source: Nintendo Support
Pokémon Blog 