Peach-io (a.k.a. Mario Peach) is an Opposite Gender Mario that she wears an outfit looks similar to him and a red cap that has the «P» symbol for her name. Also, her blonde hair seems to be a really bit longer (just inches) than when she is in her normal suit. When she says, «I'm a Mario!» it is a reference to Mario's catchphrase, «It's-a me, Mario!» which he says throughout in Super Mario 64. From now if it was, it could still be in a reference game called «Super Princess Peach». She could go on an adventure (formerly with Princess Daisy dressed up as Luigi in a Mario short called «Super Peach Sisters») or she can save herself now by the way. However, this character was designed by Gabasonian on DeviantArt (2013–2014) and YouTube (2020) and she was first appeared in a Mario short called «When Peach Dresses Up as Mario» and last appeared in a Mario short called «Super Mario Opposite Day» (Mario as Bowser, Peach as Mario, Bowser as Peach).
thanks to Gabasonian (for most lovely Mario fans because he's a former DeviantArtist who has transitioned into YouTube cuz someone N-joyed the randomness), DeviantArt, Google for YouTube, Twitter, Instagram, and all