Bowser , also known as King Bowser or King Koopa, is a fictional character and the main antagonist of Nintendo's Mario franchise. In Japan, his title is Daimaō . He is the arch-nemesis of the plumber Mario, and the leader of the turtle-like Koopa race. Bowser's defining traits are his monstrous appearance with dragon-like elements, full-throated roar, fire-breathing abilities, and tyrannical personality. His ultimate goals are to kidnap Princess Peach, make her his queen, and conquer the Mushroom Kingdom, and eventually the world.

Mario is a character from the Mario franchise. Created by the Japanese video game designer Shigeru Miyamoto, he is the mascot of the video game company Nintendo. Mario is an Italian plumber who resides in the Mushroom Kingdom with his younger twin brother, Luigi. Their adventures generally center on rescuing Princess Peach from the villain Bowser while using power-ups that give them different abilities.