95 - Since her last appearance in the series (The Mario VS DK games with the toy factories), Pauline has since become mayor of New Donk City (which is heavily implied to be where the original Donkey Kong games took place) which before appearing in Super Mario Odyssey, had something happen to it offscreen during the events of Super Mario Galaxy, though this is never further elaborated upon.

96 - In SMO, Mario can us his hat that is possessed by a ghost of sorts named Cappy (because puns) to possess other creatures and objects that don't have a hat on them already (this is literally the only requirement to be immune) unless Mario knockc the hat off, then they are free game.

97 - Using Cappy, Mario can take control of almost anything, even Pauline making it the only (currently) canonical time that Mario is female. It is also the only confirmed canonical time Mario is inside Pauline (HEEYOO!!!)