Mystery Adventure Pack and Impossible Pack.
The final two Coin Rush course packs for New Super Mario Bros. 2 are now available to download from the in-game Shop menu, Nintendo has announced.
The Mystery Adventure Pack features three courses that challenge you to look for different paths on your way to the goal in ways you didn't see in the game's original courses: explore the various underground routes in Course 1, ride on flying blocks as you collect coins in the auto-scrolling Course 2 and use the various objects placed throughout Course 3 to find your way to the end.
The Impossible Pack ramps up the difficulty to "extreme" levels. There isn't a single power up or even a coin in the entire pack and the only way to receive coins is to complete the course as quickly as you can.
Each course pack is priced £2.
Source: Press release