just saying that i tried to do it with my ems nds adapter, and it didn't work.
i backed the 'save up' before i even put the cart in my ds, and i recieved a 1024kb save, full of 0's. when i started the game and saved, and backed it up on my pc, this time, there was a chunk of lines of F's, then it went into 0's again, also 1024kb.
when i went to write the empty (before i started the game) save to the cart, it took the usual time the adapter takes, so i thought it worked, but i booted up the game afterwards and my save with my character was still on there. so i can't get saves to or from my cart!
i have also tried 3in1 backup tool, but so have other people.
just informing, thanks.