He is an idiotic Italian plumber who is SMG4 and Meggy‘s best friend, Luigi's older twin brother, the avatar of SMG3 and SMG4, a designated hero (a loose term, albeit not originally) of the Mushroom Kingdom, Bowser's former arch-nemesis, Princess Peach's former love interest, and the co-leader of SMG4's Gang. Mario is an immensely dumb, narcissistic and troublemaking person, and despite his good intentions, his selfish and stupid behavior often antagonizes and ruins people's lives.