Joining the league is simple. Just follow these steps.

First, review the rules for selection of Pokémon and Squads.

Secondly, once you understand what you are allowed to have in your squad (please, don't hesitate to ask a League Official if you are unsure), create a squad, and give them signature moves if you wish. Have a look at other trainers' squads for examples of such techniques, and use them as a guide to the maximum power you may give yours. It is highly recommended that you create signature moves for your Pokémon, but it is not necessary. In order to get started quickly, you may wish to submit your Pokémon without signature moves - look for the Sigless submissions thread in the squad maintenance forum. This will allow you to begin battling immediately. You may add signature moves right away or at a later date, but you will be unable to use signature moves until they have been approved by a League Official.

Once you have created your squad's signature moves, post it up on the thread entitled "PASBL: Squad Submissions". Your signature moves will be reviewed as soon as a League Official is available to do so and will either be approved or suggested modifications given. For moves where there were suggested modifications, you can either accept these, in which case the move is approved, or create a new move for approval. If you make changes besides the ones the League Official has suggested, then you will have to let a League Official know that changes have been made. There's a short guide on the format of how to post a squad in the main threads forum that you should read before posting. There's a formatter created by Rabscuttle to automate this process, which can be found under the main menu of the PASBL site.