mario,luigi,bowser,dry bones,yoshi,toad,princess peach,baby peach,baby mario,daisy 13 in total.
Some of the main people in the Mario series are Mario, Luigi, Peach, Bowser, Toad, Donkey Kong, Wario, Waluigi, and Yoshi.
There are to many to write
13 main
There are total of 5 letters in Mario
Inki
Mario Mario (his first and last name is mario)
Mario's hole name is Mario
Calvin
all of them
Check their pages on Narutopedia
Mario's name is acutally Mario Mario as established in the Mario Brothers Movie, and in game titles in witch they refer to them as the Mario brothers. Them being Luigi Mario and Mario Mario.
Amitabh bachan