The long-requested feature was added via a game update on Tuesday and allows players to join friends in either Multiplayer Versus or Multiplayer Co-op modes.
At launch, Mario Maker 2 did not support online play with friends, only random players.
It was initially claimed limiting multiplayer to just random players would avoid ‘compromising’ the game’s global leaderboards, although Nintendo changed its stance since the feature was first implemented.
Following Tuesday’s update, the Nintendo Switch Online mobile app is also now supported, allowing players to automatically match online with people that they were matched with via the app, and voice chat with them.
In a previous update Nintendo doubled the number of custom courses players could upload in the game, from 32 to 64 courses per user. The company said it will raise the course limit “one more time” in the future.
According to NPD Group, Super Mario Maker 2 set a new record high for launch month sales of a Mario Maker title, surpassing both the September 2015 release of Super Mario Maker and the December 2016 release of Super Mario Maker 3DS.
The Switch exclusive was the best selling game in the US for the month of June.