Sean Velasco, from Yacht Club Games, confirmed that Shovel Knight is selling well, where it’s “across all platforms and it’s exceeding expectations” (this means 3DS, Wii U and PC).
At the moment, the game is only available in North America, marked in the case of the 3DS and Wii U and worldwide for PC. The game will be released soon in Japan and Europe via both 3DS and Wii U eShop.