You use a capture device like so console >>> capture device >>>> pc. A good tv card or a capture device like EZcap. Then use a piece of capture software such as camstudio or arcsoft total media. Good capture devices are Hauppauge HD PVR or Elgato Game Capture HD but I used to use MY EZcap. For the 3ds I believe there are adapters out there to connect it to a SCART or HDMI output so just get one of those and hook it up to your capture device then to your PC
@TheLegendofZelda15 same here, the boat is like stuck in the same spot in both "worlds". i didnt see it go down the first time, it probely went down at that time.. then I got stuck, and searched for some info here on youtube and here I am. is it a bug of some sort, maybe?