Super Mario Bros. is a platform game developed and published in 1985 by Nintendo for the Famicom in Japan and for the Nintendo Entertainment System (NES) in North America. It is the successor to the 1983 arcade game Mario Bros. and the first game in the Super Mario series. Following a US test market release for the NES, it was converted to international arcades on the Nintendo VS. System in early 1986. The NES version received a wide release in North America that year and in PAL regions in 1987.

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.