From Bulbapedia, the community-driven Pokémon encyclopedia.
The Gourgeist Festival (Japanese: パンプジン フェスティバル Pumpjin Festival) is a holiday that is celebrated in the Pokémon world at night in an unnamed town between Dendemille Town and Anistar City. It was shown in A Festival Trade! A Festival Farewell?.
During the festival, the participants put on costumes of Pokémon. On the streets the participants trade sweets with each other. At the end of the festival, fireworks are shown.
List of costumes
The costumes which are shown throughout the festival
In other languages