For this post, I will be talking you through the setting up of a LAN server for Mario Kart 7, which, like Minecraft on PC, works in game.
On the main menu of Mario Kart 7, there is 3 different option, you will have to select "Local Multiplayer" to get started.
On this screen it will show 4 different rooms hosted on your console, you can open one of these if you want, but to make it simpler, we will select "Create a Group" at the bottom of the screen.
On this screen you will wait for other players to find your game through Nintendo DS download play, through that they will join your game set up.
Here is an image of people joining my game, at this point we are ready to either wait and let more people in the room join, or just start.
The game is officially set up, from this point you can just do things like you do in single player.
A picture of proof that all 3 extra players have joined and are ready to play, they are all shy guy though, simply because they do not own the game themselves.
And here is all of the players huddling around each other ready to play some Mario Kart 7!