Bowser Koopa, also known as King Koopa, is a video game character and the main antagonist of Nintendo's Mario series. In Japan, the character is known as Koopa bears the title of Daima. Bowser is the leader and most powerful of the Turtle-like Koopa race and is Mario's greedy archnemesis beginning with his first appearance, in the game Super Mario Bros. His ultimate goals are to marry Princess Peach, defeat Mario, and conquer the Mushroom Kingdom. Since his debut, he has appeared in almost every Mario series game. Currently, Bowser is voiced by both Scott Burns and Kenny James.