League arenas of various sizes exist in many different locations across Ceriah and act as hubs of activity for trainers wherever they're found. These facilities consist of a main building which is always attached to a Pokemon Center and usually many arenas of different sizes and types.
Once in the main lobby a trainer may sign their team, which they must determine beforehand, up for a match. A computerized match-making system in the lobby then attempts to find a suitable opponent based on team composition and the times both trainers are available. If no valid opponent exists at the time of input, the trainer will be alerted via Pokedex when one is found.
It's possible to reserve an arena for personal matches with friends, but no credits will be awarded to either party.