This is Mario Tennis Open, an Official/genuine ‘not for resale’ demo cartridge for the Nintendo 3DS and it is CARTRIDGE ONLY.

This is a very rare PAL game demo that was not released to the public.

This game demo is in very good condition as pictured, has been tested and in full working order.

If you have any questions about this or any of my other listings feel free to message! I am also happy to offer combined shipping on multiple listings/orders in order to offer a competitive rate!