Union of Youth is a club made by energyman2289, Mikokiri and quinfordmac. The main idea of the club is that these users represent youth on the Smash Board. There are a lot of users on the Board that are well into their 20's. Union of Youth is just meant to show that not everyone on the Board has to be an adult who has been playing Smash since they were 10 on their N64.
To join Union of Youth, the first (or should I say "only") rule is you must not be 18 or older. If you wish to join the Union of Youth, please contact energyman2289 or Mikokiri, either on this wiki or GameFAQs.