For the record, Mizuryu Kei wrote this like a week before the whole Bowsette meme took off. That's why the depiction of Peach in this isn't exactly the usual Bowsette design and why it has Peach instead of a female Bowser. This was really just a pretty well timed work about a Mario Bad End or a Defeated Princess Peach as the title suggests.
Me: this is gonna be great!
*pops in disk a sees this*
Me: it's time to smash! ;)