That was on the cusp, anyway - although, granted, that was more fan-driven than anything that Nintendo ever actually suggested. See Bowsette - although "she" isn't actually canon, fans ran with a "Princess" powerup that was designed to allow Toadette to temporarily transform into a faux-Peach. That powerup was given to Bowser to create "Bowsette", a clone of Peach, but with Bowser's horns, shell, and tail. Now, it's not uncommon to see a certain sect of fans suggest that Mario would be saving trans-Bowser from Peach, instead.