The Finals is a single-elimination tournament of the eight finalists: the player and all the Gym Leaders, minus Opal. All Trainers battled during the Finals will Gigantamax their last Pokémon at the first opportunity.
Before the Finals officially commence, Bede will suddenly enter the stadium and challenge the player.
Before the Champion Match between the player and Leon begins, Rose will suddenly interrupt the tournament via a broadcast, announcing that he has brought about the Darkest Day. The battle against Leon will recommence after the player has defeated Eternatus.
After completing the post-game story, the player can participate in Champion tournaments any time they want. In addition to various NPCs the player has met during the main game, several minor Gym Challengers also take part in these tournaments.
After completing both The Isle of Armor and The Crown Tundra stories, the player is allowed to compete in the Galarian Star Tournament at Wyndon Stadium, which consists of a Multi Battle elimination tournament with NPCs that the player has already met.
In the next episode, Ash and Goh tried to battle the Drednaw, but their attacks were ineffective against it. However, after Pikachu unexpectedly Gigantamaxed and Leon gave Ash advice, Drednaw was defeated and returned to its normal size. The next day, Leon invited Ash to a battle at the stadium, like he had requested earlier. The clash between Ash's Gigantamax Pikachu and Leon's Gigantamax Charizard ended in Leon's victory. Afterwards, Leon promised Ash that they'd have an official rematch one day.
In Toughing It Out!, Ash and Goh returned to Wyndon Stadium to watch a World Coronation Series battle between Leon and Raihan. After Leon won the battle, Ash reiterated his goal to one day battle him. Chairman Rose was also present at the stadium for the match.
In Battling Turned Up to Eleven!, Ash was designated to have a World Coronation Series match with Marnie at Wyndon Stadium. Although Team Yell initially fooled Ash into going to Spikemuth instead, Piers managed to take him to the stadium in time. While the battle between Ash's Gengar and Marnie's Grimmsnarl eventually ended in Ash's victory, Marnie's battle skills still impressed the audience and thus provided help in revitalizing her dilapidated hometown.
In Meeting Up with the Monarch!, Ash visited Wyndon Stadium to watch a World Coronation Series match between Leon and Flint. After Leon had won the battle, Ash met up with him, and he invited Ash to come training with him, which he happily accepted.
Wyndon Stadium first appeared in Letter, where a battle between Bea and Leon was broadcast. After the battle ended in Leon's victory, Rose and Oleana took a Flying Taxi found outside the stadium and used it to travel from to a children's hospital.
In Assistant, Rose and Oleana flew over the stadium in a Flying Taxi while a battle between Gordie and Melony was taking place there.
In Sky, Leon had an exhibition match with Raihan at Wyndon Stadium. John, who had come to the stadium with Leon, was enthralled to witness Leon battling live, like he had always wanted, and decided to become a Pokémon Trainer himself one day.
Wyndon Stadium appeared in The Champion, where Leon prepared for his Championship Match against Victor. While in the locker room, Leon was doubting himself after having failed to stop the Darkest Day, but his Charizard managed to encourage him to step out onto the field.
Wyndon Stadium Cards listed with a blue background are only legal to use in the current Expanded format. Cards listed with a silver background are legal to use in both the current Standard and Expanded formats.