More information about how Mario Kart 8’s DLC works online
Yesterday we learned that the downloadable content in Mario Kart 8 will be compatible online, but it won’t work if anyone in the online lobby doesn’t have it. Nintendo has since shared additional details about how the DLC functions over the Internet.
You’ll have two options when going online. It will be possible to play with the original 32 courses or with all 40 courses. When creating a tournament, you’ll again be able to select 32 or 40 courses, though you can also select to only play the DLC stages. Everyone will need the DLC if you decide to create a tournament with all 40 courses.
The one thing you’ll never have to worry about is someone being kicked out of a lobby because they don’t have the new content. Furthermore, those with the DLC won’t be disrupted because other people didn’t get the new courses.