You can now update the game to Ver. 1.2.0.
Update Details
The latest software version is needed to enjoy the following features:
◯ Offline
・ Challenger difficulty has been adjusted.
◯ Online
・ In Quickplay, the Format set in Preferred Rules is more likely to be factored into matching. This may result in longer wait times when being matched. Note that this does not guarantee that your Preferred Rules will be used when being matched.
・ Stability of real-time communication has been improved in Battle Arenas.
Note: A paid membership to the Nintendo Switch Online service is needed to use the above features.
◯ General
・ Game balance adjustments, stability fixes and other minor adjustments have been made.
・ Individual adjustments and fixes have been made to the fighters listed below.
Fighters
Donkey Kong, Link, Kirby, Luigi, Ice Climbers, Young Link, Olimar, Toon Link, Villager, Greninja, PAC-MAN, Duck Hunt Duo, Isabelle
Compatibility Issues
・The latest software version is required to enter Online mode.
・Local wireless play is not compatible with Ver. 1.1.0 and earlier. All players who want to fight in local wireless battles need to make sure they have the same software version.
・Replays are not compatible with Ver. 1.1.0 and earlier. If you want to keep your replays, convert them into videos before installing the update. You can do this via Vault → Replays → Replay Data → Convert to Video.
How to Update
1. Highlight the software on the HOME Menu and press the + Button to open the options menu.
2. Select "Software Update", then either "Via the Internet" or "Match Version With Local Users".