King Koopa. AKA Bowser. So its not Browser. :)
browser
No browser in game
Bowser
Mario
His second name is Mario
if you mean the name of the bros its Mario and Luigi but if you mean the name of the game its new super Mario bros
he has no last name.
Believe it or not, he doesn't really have a last name, The only time he ever did have a last name was in the movie (Which really didn't reflect on Mario at all.) Super Mario Bros, where his name was Mario Mario
super Mario
there is no name but i call it, "Cosmic Mario."
Super Paper Mario.
mario, browser, goomba, koopa troopa, luigi, boo, yoshi, and some other people i forget