New Super Mario Bros.[a] is a platform video game in the New Super Mario Bros. series developed by Nintendo for the Nintendo DS. It was first released in May 2006 in North America and Japan and in PAL regions the following month. It is a part of the New Super Mario Bros. subseries of the Super Mario franchise, and follows Mario as he fights his way through Bowser's henchmen to rescue Princess Peach. Mario has access to several power-ups that help him complete his quest, including the Super Mushroom, the Fire Flower, and the Super Star, each giving him unique abilities. While traveling through eight worlds with a total of 80 levels, Mario must defeat Bowser Jr. and Bowser before saving Princess Peach.
New Super Mario Bros. was commercially successful and received positive reviews; praise went towards its improvements made to the Mario franchise and faithfulness to older Mario games, while criticism was targeted at its low difficulty level and many critics noted its similarity to previous games. It sold over 30 million copies worldwide, making it the best-selling game for the Nintendo DS and one of the best-selling video games of all time. The game's success led to a line of sequels released for the Wii, Nintendo 3DS, and Wii U.