How to host a Pokemon tournament?

I've googled it over and over and nothing's any help. I want to host an online Pokemon video game tourament and these won't tell me how to do it online, just locally. They also won't tell me how to do a video game one. Can someone figure this out?

Set up some form of topic or website, have people sign up, then when everyone is signed up just pick people to face each other, they exchange friend codes, etc.

@sylar: Thanks. I'll do that.@mods: Topic can be locked.