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, Chairman 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.
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.
Wyndon Stadium appeared in Letter, where a battle between Bea and Leon was broadcast. After the battle ended in Leon's victory, Chairman Rose and Oleana took a Flying Taxi found outside the stadium and used it to travel from to a children's hospital.
The stadium briefly reappeared in Early-Evening Waves, where Nessa was confronted by Chairman Rose in the locker room after losing a match against Milo.
Wyndon Stadium is based on Wembley Stadium, the national stadium of the England national football team. Wyndon Stadium's design incorporates the famous Wembley Arch, a landmark of the stadium.