From Bulbapedia, the community-driven Pokémon encyclopedia.
The setting for the competition
The Ever Grande Conference (Japanese: サイユウ大会 Saiyū Tournament) is the Hoenn League's general championship competition.
The conference is held in Ever Grande City. It is the third Pokémon League Conference shown in the anime.
In the anime, the Ever Grande Conference happens in episodes Like a Meowth to a Flame - At the End of the Fray.
Like the Indigo League, Trainers run with a torch containing Moltres's fire to light the torch at the top to celebrate the beginning.
The scoreboard for the Full Battles
During the preliminaries, Trainers are only allowed one Pokémon in battle. Only one battle is held, and the winner moves on to the next round.
During the qualifying rounds, the Top 256 Trainers take part in three Double Battles. If at least two battles are won, they move on to the finals.
The final rounds are a series of Full Battles with the Top 32 Trainers participating. The winner of the Ever Grande Conference is the Trainer that wins all of the final rounds.
Trainers who have participated in the Ever Grande Conference
Tyson, the winner, with the Ever Grande Championship Trophy
Trainers here participated in the conference either before or after the conference Ash entered.