Pankun is highly intelligent and has learned to mimic human behaviour, including the Japanese greeting ritual and other traditional customs. Pankun is clearly devoted to James and they are inseparable. He is also James teacher and when James needed a shot from the veterinarian, James was right there with him. They even star in their own TV show, 'Genius! Shimura Zoo' Where they are given daily challenges, from negotiating the Tokyo highway, boarding a train and shopping.
And of course, they even have their own facebook page!