King Bowser Koopa Sr.

King Bowser Koopa Sr. (in Japanese: クッパ, Kuppa, "Koopa"), known primarily in Western territory as just Bowser, is the main antagonist of the Mario franchise and the Mario's arch-rival. Bowser first appeared as the primary antagonist of the 1985 classic platforming video game Super Mario Bros., and he continued to serve as the main antagonist of the entire Super Mario series. He is the tyrannical king of the turtle-like Koopa Troop race who is constantly striving to expand his Koopa Kingdom by conquering the Mushroom Kingdom.