Coin Rush is a mode in New Super Mario Bros. 2. It can be played only as one player and can be unlocked by clearing either the Castle or the Cannon levels of the first world. In this mode, the player, as Mario or White Raccoon Mario, must race through three random courses without losing a life and while collecting as many coins as possible. Of course, the players still have access to all the coin-rewarding items from Solo Play mode, such as the Gold Block.
Once players beat World 6-Bowser's Castle in the main game, they are given a Gold Flower in the Item Stock (unless White Raccoon Mario mode is chosen, in which case the Item Stock is empty), which can be used in only one of the three levels. By default, there are only one hundred seconds on the time limit allowed per course; some starts with less than 100 seconds such as World 1-1 (fifty seconds) and the third course in Coin Challenge Pack A (twenty seconds). The players can boost their time limit by collecting + Clocks and making it past Checkpoint Flags.
As aforementioned, losing a single life ends the challenge, since the players cannot collect extra lives. Because of this, collecting one hundred coins does not affect the players' life count, and all 1-Up Mushrooms are replaced by Golden Mushrooms, which give fifty coins (one-hundred if collected by Gold Mario) each. Mario's remaining time is also converted into coins (one coin for every five remaining seconds). The third random course will always be a Tower or a Castle. There are three course packs, and more packs can be downloaded via paid downloadable content at the Nintendo eShop.
The maximum number of coins that can be collected during Coin Rush is 30,000. Once that number is reached, no other coins that are collected is added to the counter. Coin Rush also features StreetPass functionality (see below), which allows Coin Rush players to challenge others' Coin Rush records.
 Coin Values
* - Order of Star Coins collected in a single level.
* - The amount of coins earned from grabbing the flagpole as Gold Mario depends on the height Mario grabbed it (i.e. The higher Mario grabs the pole, the more coins he receives).
Note: If Mario passes through a Flagpole while under the effects of a Mega Mushroom, he'll receive three Golden Mushrooms. However, Mario's coin total can't be multiplied with this maneuver.
 Starting Packs
 Course Selections List
Although the courses are selected at random with each Coin Rush run, they're not completely random, as they'll only appear, based on which Coin Rush round the players are in. Additionally, courses from the main game are also picked in the order of one aboveground stage, one underground/underwater/Ghost House stage, and one tower/castle stage, respectively. Below is a list of which courses the players may get for each round.
 Downloadable Content
Players are able to download additional course packs from the New Super Mario Bros. 2 shop. Each level pack includes three courses not found in the actual game, and costs ￥200 in Japan, £2.00 in the UK, $3.00 in Australia and $2.50 in North America. Because there are only three courses in each pack, the levels are not randomly selected, and instead are played in a fixed order. Two-to-three course packs have been released at a time, and can be bought individually or in a set with a combined price of the costs of each pack. Four sets of DLC packs have been released, with ten course packs having been released total; the Gold Classics Pack was not part of any set, being released in-between to celebrate three billion coins collected instead. The final batch of course packs were released on December 20, 2012.
Before December 20, 2012, the Coin Challenge Packs were the only Coin Rush packs to have leaderboards.
 October 2nd, 2012
Notice that this first set of packs was available in North America on October 4th, 2012, two days after the pack released in Europe and Japan.
 October 25th, 2012
 November 27th, 2012
From its release until the end of January 2013, the Gold Classics Pack was free to download.
 December 5th, 2012
 December 20th, 2012
This is the last batch of packs for New Super Mario Bros. 2. Notice that this batch of these DLC packs was released in Japan and Australia on December 21, 2012, a day after the release in North America and Europe.
Coin Rush also features a StreetPass functionality. Upon the completion of a Coin Rush session, the player is allowed to save a record of their run. This record will then be exchanged with other New Super Mario Bros. 2 players via StreetPass. Upon receiving another player's Coin Rush record, the receiving player may challenge the same three stages in the same order to earn more coins than the other player did. The number of coins needed to win is not revealed until the player beats the record. Beating the received record earns the player a Crown Coin.
In addition, each player may save only one of their own records at a time. This is the record that will be sent via StreetPass. Players may overwrite their previous record by either challenging their previous record on the same three stages, or by starting a brand new Coin Rush run. At the end, the player is given the choice to overwrite their previous record.
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