Mario or マリオ is the main character in Super Mario Brothers. He is among the most recognised fictional characters in history. He has been in over 200 games, even outside of his franchise. His own franchise is the best selling franchise in history. He is brothers with Luigi or ルイージ.
The set-up for most games is as follows: Peach gets captured by Bowser, as he plans to destroy the Mushroom Kingdom. Mario must chase after Bowser to rescue Peach. However, Mario is in more than just 2D and 3D Platformers, he is also in a majority of Kart and Party games. He even makes an appearance in some educational games.
His occupation is a plumber, although this is rarely mentioned, except in the TV Series Super Mario World. He is also Italian and his voice actor is Charle Martinet.