Who? Nintendo videogame cartoon characters.
Real? Yes, but the video was created by a humor site not affiliated with Nintendo.
Mario the Plumber has appeared in 200+ Nintendo videogames since Donkey Kong in 1981. In many of those game, he strives to save Princess Peach (aka, Princess Toadstool) from some danger or other.
In 2009, CollegeHumor.com created a two-minute animated film called Mario and Princess Sex Tape, subtitled “His true prize for defeating Bowser”. A must-see for all fans of raunchy but geeky videogame humor.