Crystal Princess Music Box is a powerful item that the Cures in Royalty Princess Precure first use in episode 30. It is used to perform the attack, Royal Finalización.
Along with the Luz Royal Keys the Music Box allows the sixth Princess Pretty Cures to access their last Party Mode, which provides them with their Queen dresses. They can also use the Crystal Princess Music box to perform their third group attack Royal Finalización. The music box also allows the Cures to use their new sub-attacks with the Premium keys. Love can use Grand Sunshine, Twinkle can use Grand Chorus,Breeze can use Grand Storm and Garnet can use Grand Brûler. It also functions as a music box, as seen in episode 46.
- Tiara and SkyBlue are the only how not use the Crystal Princess Music Box.