Two additional packs (Gold Mushroom Pack and Coin Challenge Pack B) were released on October 25, 2012. The first of this DLC was released October 2 in Japan and Europe and October 4 in North America, respectively, with three packs - the Gold Rush, Coin Challenge A, and Nerve Rack Packs, costing 200¥, €2.50, and $2.50 in Japan, Europe, and America each. The Nintendo Network is also incorporated to provide paid downloadable content, or DLC, in the form of new stages for the title's Coin Rush mode, in which a player attempts to collect the most amount of coins in the shortest time.

It also features local co-op multiplayer. The title places a large focus on collecting coins, with the mildest of actions triggering cluster of coins being released, to reach a goal of one million coins. 3 such as 'Raccoon Mario' and the P-Charge bar.

The game is a 2D sidescroller, and borrows elements from Super Mario Bros. Players control Mario and Luigi as they venture through the Mushroom Kingdom in a series of over 80 stages to rescue Princess Peach from Bowser and the Koopalings. It was released Jin Japan, August 17 in Europe, August 18 in Australia, and August 19 in North America, through both retail purchase and digital download on the Nintendo eShop, siding with the release of the Nintendo 3DS XL. The title was later fully revealed in a Nintendo Direct conference taking place April 20. The game was first revealed in an investors meeting that took place late January 2012, where Nintendo President Satoru Iwata revealed that a new 2D, side-scrolling Mario game was in development for the 3DS, set to be released in the next fiscal year, between the end of March 2012 and March 2013. It is the direct sequel to New Super Mario Bros., which was released for the Nintendo DS in 2006, though it is the third in the line, following that and New Super Mario Bros. Developed by EAD, the game is the second main series Mario title on the system, following Super Mario 3D Land. 2 is a platforming game for the Nintendo 3DS.

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