Minor note about saving in Draw
If your card is not supported by Draw, but it does have SRAM (that is, a slot-2 card), then use the save to SRAM option in Draw. Transfer the save file to your PC, and try renaming it to .png and see if it opens.
If it does NOT open, try this website: Savegames convertor and convert your file to the “Supercard One / Ninjapass / DSLinker (.sav)” format, and then try renaming to PNG.




