Pokémon the Movie: The Power of Us Description:

Fula City was founded on barren land that was suddenly engulfed in flames due to the mysterious Pokémon Zeraora. When the Pokémon and people began helping one another, Lugia, moved by the cooperative nature of them, cleared the fire. Since then, the city has held a wind festival every year to celebrate Lugia’s help while Zeraora disappeared supposedly cursing the mountain and surrounding area near the city.