In Princess Peach: Showtime! the costumes that Peach wears have gotten a lot of the spotlight as they provide Peach with unique abilities and personas, but the multitude of dresses that Peach can unlock in the game are no less spectacular. Over the course of her adventures in the Sparkle Theater, Peach can unlock almost 40 gowns that she can wear while walking around the theater and at the beginning of many levels. These beautiful dresses will even appear in her cutscenes, can add a bit of unique flavor, and are often tied to achievements.
https://screenrant.com/princess-peach-showtime-coolest-dresses-ranked-design/