Today, in the Super Mario 3D Land OT thread, some of the November firmware update is stored onto the game itself. After opening the game, you need to install the latest firmware to play it, however this update contains more than just a way of blocking piracy.
It gives you the option to join a friends game too!
It also brings: “Join the playing software” button in the bottom screen
Quick scrolling through friend list when long pressing Left or Right (analog or digital)
Friends that online will move to the front of queue automatically
So that’s some of the stuff included in the update, Mario Kart owners are going to love this!