Joining a Gym (Rule)
From D&D Wiki
So you or one of your players wants to forgo their Pokémon Trainer status and become part of a gym? By simply beating the Gym Leader you may join the gym of the leader you beat. You start off as a lowly novice within the gym, however as you defeat higher ranking members you are able to move up in the ranks.
|Rank||Title||Bonus Trainer Money|