User blog comment:Plexioth- xD/Monster Hunter 3 Ultimate/@comment-4421067-20130211202625/@comment-5489419-20130212042506

Good question. I'd really like to have this answered, as well!

To my knowledge, which is limited, I'm pretty sure you could freely transfer save data from your Wii U to your 3DS from any 3DS console that has a MH3U save file. Please correct me if I'm wrong, though!