Super Mario Bros. 3 is a platform video game for the Nintendo Entertainment System (NES) video game console. Mario and Luigi embark on a quest to save Princess Toadstool and the rulers of seven different kingdoms from the antagonist Bowser and his children, the Koopalings. The player, as Mario or Luigi, is able to defeat enemies by stomping them or using items that bestow magical powers. Mario and Luigi are given a wider range of abilities than in previous Super Mario games, including flying or sliding down slopes. In addition, Super Mario Bros. 3 introduces numerous elements, such as new enemy characters and the use of a world map to transition between levels, that have reappeared in or have influenced subsequent Mario games.
Bowser has returned to the Mushroom Kingdom and with his seven Koopalings, he tries to conquer it again. He sends his Koopalings into seven kingdoms of the Mushroom World to capture the king of that area, steal their magic wands and alter the kings' appearance. Princess Peach sent Mario and Luigi to go and stop the Koopalings and turn the kings back into their normal form. After fighting each Koopaling, they received the magic wand and turned the kings back to normal. However, this was only a distraction so that Bowser could kidnap Peach again. The bros. then traveled to Dark Land, where Castle Koopa is and rescued Peach.