From Bulbapedia, the community-driven Pokémon encyclopedia.
The Hearthome Collection (Japanese: ヨスガコレクション Yosuga Collection) is a competition for Pokémon Stylists and their Pokémon, featured in Arriving in Style!. It takes place in Hearthome City's Contest Hall and is hosted by Enta. The two judges are Pokémon Stylists Paris and Hermione.
The judges, Paris and Hermione, with Paris's Lopunny
wearing the tiara she received for winning
The competing Pokémon Stylists dress or style their Pokémon in a fashionably or unique way. They must then perform an entertaining attack combination just like in Pokémon Contests.
The top three Stylists are awarded with three awards. The first one for the overall winner, the second one for the best costume, and the last one is for originality.