Other demos transfer data to their full versions as well.
MH3G has a tool to transfer to the WiiU. New Love Plus has a data transfer too for the DS games.
The functionality has been there since the start of the 3DS.
Which begs the question: Why aren't they implementing it now that they're pushing downloads so hard? The functionality is there, people want it, yet they're not pushing it out yet. Puzzling decision to say the least.
This. --- "OldSchoolGaming4Life" on YT/"90sRetroGaming" on mariokartwii.com