Mario

Mario is an Italian plumber originating from Nintendo's Super Mario franchise. Mario is one of the two protagonists of SMG4 (alongside SMG4), due to the use of Super Mario 64 as its foundation. He is the older brother of Luigi, the designated hero (a loose term) of the Mushroom Kingdom, (formerly) the archenemy of Bowser, and the lover(?) of Princess Peach. He sometimes refers to himself as Mario the Sexy Plumber.

In SMG4's videos, as opposed to his selfless heroic portrayal from the Nintendo canon, Mario is portrayed as an immensely dumb, narcissistic jerk befitting the comedic nature of the series. His annoying and stupid behavior often antagonizes and ruins people's lives.

Description and Reputation
Mario is an Italian plumber originally from Nintendo's Mario franchise, though he made his first real appearance in Donkey Kong under the name "Jumpman". As most of SuperMarioGlitchy4's bloopers make heavy use of Super Mario 64 and its characters, Mario is the main protagonist in the SMG4verse and appears in most of SMG4's videos. He has been part of the main cast since the first season, alongside SMG4. He is the older brother of Luigi. According to The Grand Mario Hotel, he is known as Stupid Mario (or as he calls himself Mario Sexy The Plumber).

For the longest time, it was uncertain whether Mario was a hero or a menace to the Mushroom Kingdom. In earlier days, Mario didn't really care about his heroic status, preferring to eat, sleep, or do whatever he wanted. He also loved pulling pranks on people (read Toad, SMG4, Luigi, Bowser) and carried pairs of panties wherever he went. The people closest to him learned to cope with his daily idiocy (for some, like the aforementioned Luigi and SMG4, they more or less have functional friendships with him, whereas Toad can hardly stand to be in the same vicinity as him), especially these days.

In SMG4: Bowser Loses Custody Of His Children, Peach, severely annoyed by Mario's incompetence at raising his "simulation child", said he was a menace to society and would probably not have any children if he kept acting terribly.