I think i'm pretty good at Mario Kart i'd be up anytime if you want a race.
Basically what you have to do is, is when the game loads up and the four profiles come up, you find which one is yours and on it should be a long line of digits.
Basically that is your online code. You need to post that on here or give it to anybody you want to be added as a friend. So the other person needs your friend code, and you need theres to add them as friends.
The idea for it to work is set up another thread called Mario Kart Wii (Tournaments) or something along those lines. Get people to post their friend codes on it, then basically arrange a time to do it, sort out what kind of mode your gonna play, who's gonna be the host etc, then basically add everybody who puts their friend codes and add them as friends and have a big grand prix.
Sorted.