Everybody’s making such a big deal about Toadette being able to turn into Peach (or a Toadette version of Peach called Peachette), and asking “how does this affect the lore”, but like… this isn’t the first time in the series that a power-up/item changes one character into another. In Super Mario 64 DS, Yoshi could turn into Mario, Luigi, or Wario using hat power-ups that resembled the hats of these characters. Later on, these same characters could also use these hats to turn into either of the other two plumbers. So, I’m pretty sure this crown power-up is essentially the same thing as those caps.