>>40009387>Bondage, petplay, and softcore tortureTrainers use dark or fairy type pokemon.
Items and switching are disabled in battle but you get to restore your party health right before the gym leader. If you leave the gym everything resets, because it's an endurance fight.
Main gym gimmick involves you not letting your pokemon faint. Every time a pokemon faints on your team (even if you win the battle) it's sent to the dungeon and removed from your team. But, if you have open slots on your team (either from the start or because you lost a pokemon) you get to enslave one of your opponent's knocked out pokemon at half health.
When you fight the gym leader, part of his team is comprised of your pokemon that were knocked out and sent to the dungeon.
Too complicated for a gym, maybe? I tried not to make it too fetishy.