Authentic! Complete with box, cartridge, cart tray, manual, overlay in sleeve. Game cartridge was tested and works. Box has edge/corner wear, dings, creases, scratches etc. One area of note is on the right spine (see pics). Box also has a sticker on the top of the box and some tape on the back. Manual & cartridge are in excellent shape. Includes overlay (near mint!) in original paper sleeve (lightly crinkled). See pics for description details and functionality!