From Bulbapedia, the community-driven Pokémon encyclopedia.
A Pokémon League Conference (Japanese: ポケモンリーグの大会 Pokémon League Tournament) is an anime-exclusive championship tournament that is hosted seemingly annually in several regions in the Pokémon world.
The general structure of each League Conference is similar: Trainers must register for the region's Pokémon League before they earn any of the region's Badges, something which they can do at seemingly any Pokémon Center or with a Pokémon Professor, and then must win at least eight of the region's Badges in order to be able to register for the competition.
The tournament competition itself has an opening and closing ceremony. In some regions, there is a torch with the flame of Moltres or Ho-Oh that burns during the entire tournament, a reference to the real world's Olympic Games.
The day after the ceremonial torch has been lit, in some of the regional leagues the qualifying rounds begin so as to weed out Trainers who have gotten the required eight Badges, but are not yet skilled enough to continue, and those who survive move on to the preliminary rounds. In other regional leagues, instead, the preliminary rounds will begin right away, and will continue for several days until the top sixteen Trainers have been decided. At this point, there is a short break in the competition so that the Trainers and their Pokémon may rest, followed by the start of the final rounds.
In the final rounds, most, if not all, battles are Full Battles, with each Trainer competing with six Pokémon on each side. All battles are conducted in the main stadium, and Trainers move up the tournament tree in single-elimination style. The winning Trainer, upon defeat of their opponent, is awarded a trophy.
Certain Leagues use various types of fields during Pokémon battles. While Conferences held at the Lily of the Valley and Vertress uses only a standard dirt battlefield; the Indigo, Silver, Ever Grande and Lumiose Conferences held battles on various different battlefields, like icy, rocky, forested, grassy and water to name a few. A standard rule for the Conferences with a myriad of battlefields, is that during the full battle stage in the tournament, once one side loses three Pokémon, there is a short break, during which, a field change occurs.
Only those who win the Pokémon League can officially challenge the Elite Four and Champion of that region.
List of League Conferences
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