New Super Mario Bros. 2: Doki Oki Panic is a side-scrolling 2D action-adventure platform game for the . It was released in Japan on July 28, 2012, in Europe on August 17th, in Australia on August 18, in North America on August 19, and in Hong Kong on June 21, 2013, while in Italy the game was separately released on August 24, 2012, for the retail cartridge. It is the thirteenth title in the main series and the third in the New Super Mario Bros. line after New Super Mario Bros. for the Nintendo DS , and New Super Mario Bros. Wii for the Nintendo Wii. As the indirect sequel to New Super Mario Bros.
After learning that that the events of New Super Mario Bros. were merely an experiment: Bowser has been toying with immortality, and his transfiguration into Dry Bowser has given him great hope that he will finally be able to thwart Mario by outliving him! So Bowser decides to kidnap Princess Peach once again and try to take over the Mushroom Kingdom once and for all.
According to Nintendo, New Super Mario Bros. 2 is the first title and the first Nintendo game overall to be available for purchase in both packaged (retail) and digital (downloadable via the ) versions. The digital version can be stored onto an SD card, along with multiple other games, and be played on the Nintendo 3DS, but they cannot be shared with other Nintendo 3DS handhelds.
Standing on the Balcony of Princess Peach's Castle, Mario and Luigi are eating pancakes. However, a dark cloud surrounds the castle and strikes it with thunder, the Koopalings along with Boom Boom and Pom Pom jump out of the thunder cloud wearing scary masks, holding Princess Peach they flee. Mario and Luigi chase after the cloud. Now Mario and Luigi must go through eight different worlds.