Nintendo released a new Pokémon spin-off on the 3DS eShop today called Pokémon Shuffle. You can download it right now if you want to, because it's free. But just because it's free doesn't make the game worth your time.
Nintendo has a new free-to-play downloadable 3DS Pokémon puzzle game (with microtransaction support, it sounds like) coming this February. It's called Pokémon Shuffle and might remind you of Pokémon Trozei. It was announced in this morning's Nintendo Direct by Nintendo boss Satoru Iwata.