Go to Wyndon and you'll go straight to the stadium for the Semin Finals. First is against Marnie who Gigantamaxes Grimmsnarl here
Defeat her and next up is against Hop. He Dynamaxes his starter
After you defeat Hop, you exit and meet Leon and he suggests taking a break at the inn until the next day and getting dinner. However, Piers arrives instead and mentions Leon went off to Rose Tower. However, when Marnie and everyone go onwards, Oleana gets in the way and says Rose isn't to be disturbed and that she gave the monorail key to a member of staff
Each time you find the member of staff he battles you until he gives you the key. Go up to the tower and you'll have to face off Macro Cosmos staff on the way up
Defeat her and next up is against Hop. He Dynamaxes his starter
After you defeat Hop, you exit and meet Leon and he suggests taking a break at the inn until the next day and getting dinner. However, Piers arrives instead and mentions Leon went off to Rose Tower. However, when Marnie and everyone go onwards, Oleana gets in the way and says Rose isn't to be disturbed and that she gave the monorail key to a member of staff
Each time you find the member of staff he battles you until he gives you the key. Go up to the tower and you'll have to face off Macro Cosmos staff on the way up