Princess Peach: Showtime brings players to the charming world of Sparkle Theater, where the Theets who inhabit the venue perform various plays across the theater's stages. Not all is peaceful at Sparkle Theater, as shortly after Peach arrives, the theater is taken over by the nefarious Grape and the Sour Bunch, who trap the theater's star Sparkla performers in the basement. While the premise of Princess Peach: Showtime is fairly tame given that it's a game in the Mario franchise, there is one boss fight that seems to draw inspiration from a much more mature title outside of Nintendo's sphere of family-friendly IPs.