Gyms and Gym Leaders.
Gym Leaders are also technically Sub Chiefs as they have authority though mainly related to their Gyms and small areas around it, depending how popular they are.
Now as Dragon Battling is seen as a crime or highly inhumane to beloved Dragons a more softer type of battling has been developed , while it could count as battling still its focused more on not harming but skill, precision, focus and ingenuity. These are both survival and defensive trials .
Hence Gym battles are renamed to Dragon Trials, the Challangers will go with their chosen team or single Dragon through multiple trials to test their bonds, target practice, stealth trials, mazes etc . All Trials are based off to suit each Gym which go by certain typings and sometimes Classes of Dragons.
If a challangers is injured or dragon, depending on how badly, these challangers can choose to keep going or retreat to heal up, though injured ,a Gym Leader usually encourages them to back out, some though a bit harsher encourage to tough it out .
