A Gym Leader is a character in the Pokémon video game series who specializes in a specific type of Pokémon. Players challenge Gym Leaders to earn Badges, which are required to compete in the Pokémon League. Each Gym Leader has a unique battle strategy and a team of Pokémon that reflects their specialty, such as Water, Fire, or Grass types. Defeating a Gym Leader not only grants players a Badge but often also rewards them with a special TM (Technical Machine) that teaches a valuable move. Gym Leaders are typically found in Gyms, which are themed locations that serve as arenas for battles.