New Super Mario Bros. 2 is a 2D side-scrolling platform video game in the New Super Mario Bros. series developed by Nintendo for its Nintendo 3DS handheld video game console and was released on July 28, 2012. It is the third game in the series, as a direct sequel to the 2006 Nintendo DS game New Super Mario Bros., which is a follow-up to the 2009 game New Super Mario Bros. Wii. It is the first Nintendo-published game to be released simultaneously in both downloadable and physical forms.

The game's plot is similar to its predecessors, focusing on Mario and Luigi's efforts to rescue Princess Peach from Bowser and the Koopalings. It has a heavier emphasis on coin-collecting than other Super Mario games, with multiple unique items dedicated to producing large numbers of coins. The game features a specialized mode called "Coin Rush" that focuses exclusively on quickly completing a series of stages while collecting as many coins as possible. Additional Coin Rush stages were made available for purchase as downloadable content shortly after the game's release.