Then, click "Arena Settings" - it's the yellow icon in the top left of the screen next to the back arrow. To find the Battle Arena ID, create an Arena. Then, anyone with the ID can join your Arena. If you aren't friends through the Nintendo Switch, you need to share your Arena ID. If you're already officially friends through your Nintendo Switch account, choose "Create Arena," and your friends will be able to find you through "Join Arena" then "Friends' Arenas." The only way to play with friends online is by using Battle Arenas. If you want to not use an exploit again to load the CTGP-R application, add the CTGP-R Channel to your vWii Menu. Battle Arenas: Use this to play join a room with set rules already, or to play with particular people, like friends.Background Matchmaking: The same as Quickplay, but will matchmake in the background while you play Smash normally.All your matches will be team battles against other players playing the same way. This can be played Co-op with two players on the same Switch. Turn on Preferred Rules to choose what settings you'd like - such as no items, Stage Hazards, etc. Quickplay: Choose this to play with random players around the globe.Select "Online" from the main menu select screen, then choose "Smash." Help Us Hunt Desyncs SSF2 Beta Developer Q&A Thread - PLEASE READ THE OP SSF2 on SmashLadder (Community Chat, Matches, Leaderboards) My final thread: Guessing the remaining Final Smashes.Considering Smash Ultimate works with a peer-to-peer connection, Nintendo has suggested to purchase a LAN adapter to connect your Nintendo Switch directly to an ethernet cable for a more stable connection. You'll need a Nintendo Switch Online subscription. First, make sure your Nintendo Switch is connected to the internet.As we mentioned before, playing online is as simple as selecting "Online" in the menu select screen.