Peachette

Peachette is a unique form of Toadette's that appears in New Super Mario Bros. U Deluxe, obtained by grabbing the Super Crown. In this form, she highly resembles Princess Peach. However, there are differences, notably her different dress, Toad cap-like crown, gray irises, pigtails, and Toad-like shoes. In this form, Toadette is able to Double Jump, and can also perform Peach's Floating Jump, identical to how the Flying Squirrel form functions (though she cannot wall cling). Additionally, she automatically gets boosted out of any pits she falls into. However, this works only once; if Peachette attempts this again, she will fall into the pit and lose a life as a result. This effect, and the conditions of it, also applies to lava and poisonous water.

Super Smash Bros. Ultimate
Following the version 3.1.0 update released on May 30, 2019 and during the "Super Smash Sisters" event that ran from May 30 to June 4, for Super Smash Bros. Ultimate, Peachette was available into the game as a primary, Ace-class spirit, though she was accidentally revealed a week earlier on May 21. In her spirit battle, the player was required to defeat Peach, Mario, Luigi, and a Mii Brawler dressed as Toad on Mushroom Kingdom U within one minute while under the effects of low gravity and a higher launch rate.

Mario Kart Tour
Peachette appears as a playable character in Mario Kart Tour, but it is unclear whether she is her own character or an alternate costume for Peach.

New Super Mario Bros. U Deluxe

 * North American website bio: "With the help of a Super Crown, Toadette can magically transform into the super-powered Peachette, double-jumping and floating over obstacles with ease."