Ash, Pikachu and others in “A Mission of Ultra Urgency!”

[Everybody goes up the elevator to get their ride Pokémon. First, Ash and Pikachu climb aboard a Garchomp]

[Sophocles and Togedemaru jump on a Metang]

[Meanwhile, Mallow and Steenee jump on a Flygon]

[Lana and Popplio land on the back of a Dragonair]

[Meanwhile, Lillie and Snowy land on the back of an Altaria]

[And Kiawe and his Marowak decide to ride on the back of Kiawe's Charizard]

[The gates open for each Ultra Guardian and their ride Pokémon, and each of the platforms they are standing on rotate 180 degrees. Then, they get sent up one by one. At the same time, the Alolan Exeggutors that stand outside the Pokémon School lean back as the river opens up, forming a waterfall. A platform in the water rises, as do the Ultra Guardians on their Pokémon. Then, the platforms go rolling along and the Pokémon go flying out of the waterfall and into the sky, with Garchomp and Metang going first]

[Garchomp and Metang are eventually followed by Flygon, Dragonair and Altaria...]

[...and finally, Kiawe's Charizard]