how do you add gb games onto your ds with roms and have it come up as virtual console?

Hi, I've been adding games to my new nintendo 3ds XL today and was confused about how i could download some games as virtual console? I want Kirby nightmare in dreamland on my 3ds and i'm not sure how to download it on, because it isn't available in the Hshop. if you know how to put virtual console on your ds please tell! do i just have to put the game file into the gba folder?