Three content packs for New Super Mario Bros 2 will be hitting the 3DS eShop today, including the Gold Rush Pack (get 30,000 coins against the clock), Coin Challenge Pack (a leaderboard challenge), and a masochistic Nerve-Wrack Pack (does exactly what it says on the tin). Each will set you back £2, and you can watch them in action in a new Nintendo Direct Mini presentation.
We awarded Nintendo's latest platformer with a 7/10 score in our New Super Mario Bros 2 review, suggesting that the coin collection hasn't been integrated into the core Mario experience in a particularly relevant or thoughtful way.