I'm going to look into this more thoroughly once support for the n3DS is available. I can extract the Mii Plaza data from my primary 3DS and import it into one of my other 3DSes. My gut says you can already do this as I've been able extract the Mii Plaza data with SaveDataFiler. But I haven't looked at the files extensively or attempted to import that data to another unit yet.1) I am still trying to figure out how to dump the save game of Streetpass Mii Plaza (to transfer it from one machine to another). Is it possible to do this?
My ultimate goal isn't to simply copy or transfer data from one unit to another. What I want to do is create a "perfect save", with all puzzles completed, max army in the conquest game and such. I'd then run that 3DS along side my own while I'm out and about to help people complete their puzzles and such.