In order to download title updates for wii u, you need to use Uwizard or NUSgrabber to download them directly from nintendo servers to your pc. I discovered that a similar app, 3DNUS(https://gbatemp.net/threads/3dnus.376488/) exists for the same purpouse. However to use it, you need to know the title ID and version. For the wii u this is well documented here http://wiiubrew.org/wiki/Title_database . I can't find anything similar for 3ds, does anyone know how can i get 3ds title update id's and versions?