Pokémon gyms are places for trainers to test their strength and earn badges by proving themselves in battle against their resident gym leaders. However, aside from the gym leaders themselves, these organizations also employ other individuals.
“Gym trainers” aid in the day-to-day maintenance of the gym and have varying duties depending on where they work. For instance, those employed at the Hibiscus Gym might be trained pokémon rehabilitators, while those working at Ironwood Gym might be up-and-coming entertainers. But more than this, the gym trainers also offer a sort of “warm-up” match for trainers who have come to challenge for a badge.
As understudies for the leader, all gym trainers raise pokémon that reflect the gym's specialties. Hibiscus favors water, ice, and flying types. Plumeria favors rock, grass, and bug types. Hinoki favors fire, psychic, and dark types. Ironwood favors electric, steel, and normal types. Wisteria favors dragon, fairy, and ghost types.