ARMS just got an update on Nintendo Switch.
This update is little over 100MB and it brings the game to version 1.1.0. The mode adds LAN play with an option to switch between local wireless and LAN easily. It also adds an Arena Mode where people can spectate while others fight. There have also been some fixes and changes to characters that you can read here in Japanese.
ARMS is available on Nintendo Switch. Read our review here.
Source: God is Geek