According to a recent Nintendo email newsletter, 3DS downloadable title Pokémon Shuffle is set to release next week.
The newsletter lists the title with a February 18th release date; the game is listed with a February 2015 release window on its official site, so this release date makes sense. Pokémon Shuffle was announced during the most recent Nintendo Direct and is supposed to be a free-to-play puzzle game, similar to Pokémon Trozei! and various mobile games.
Source: Nintendo newsletter