Princess Key

A keyring for attaching Princess Keys

A Princess Key (Japanese: プリンセスキー Princess Key) is an item which denotes a Performer as having won a particular Pokémon Showcase Rookie Class, similar to how a Ribbon is awarded to a Coordinator who has won a Pokémon Contest and a Badge is given to a Trainer who has defeated a Gym Leader. Princess Keys are given by Monsieur Pierre's Klefki at the end of each Showcase, and they come in various styles and colors.

It was revealed in Performing with Fiery Charm! that after winning their first Showcase, Performers are given a large decorated keyring which they use to hold the Princess Keys they receive during their journey. In order to compete for the title of Kalos Queen, a total of three Keys must be collected to qualify for the Master Class, the Showcase equivalent of the Grand Festival and the Pokémon League Conference. At the beginning of the Master Class, Performers use their Princess Keys to unlock a door to gain access to the stage.