After clicking the sign up link that a host posts in the room, you will be taken to a page similar to the one shown below. If you are logged in, click on the blue "Sign up" button and you will be taken to the bracket page. If your Challonge username is not the same as your Pokemon Showdown! username: Click on the “Sign up with an alternate name” text and enter your Pokemon Showdown! username. This way, other players will be able to find you on the userlist. Once you enter your name, you will be taken to the bracket page.