Gekijouban Pocket Monsters: Minna no Monogatari Gaiden - Episode Zeraora

Ash and Pikachu arrive in Fula City at the start of its renowned Wind Festival and meet Margo, the mayor's daughter, and Dr. Hawthorn, a scientist. Through the magic of Dr. Hawthorn's virtual reality technology, our friends experience the history of the city firsthand and meet Mythical Pokémon Zeraora and Legendary Pokémon Lugia. Why did one of them fly off, never to be seen again...? And will it return in the film Pokémon the Movie: The Power of Us?!

(Source: Viz Media)