Developer Game Freak is best known for their work on the Pokemon games. In fact, that's pretty much all they ever do. But their interesting music platforming experiment, HarmoKnight, is coming soon to the US. Not only is it the studio's first 3DS game, it's also their first new IP since 2005's Drill Dozer.
Little else is known about the US release of the game, but it should hit the 3DS eShop sooner than later. As Siliconera points out, the game will hit Europe in March. A US release is likely to be close by.