Lucario is a bipedal, canine-like Pokémon, with fur that is predominantly blue and black. It has developed four small black appendages on its head, which rise when Lucario reads or manipulates aura, a special energy that it senses. Lucario can understand human speech, and have been reported to communicate with humans through telepathy. Lucario is considered to be prideful, and is extremely loyal to its Trainer. It also seems to have a natural sense of justice. It usually lives deep in mountains very far from people to improve their skills. It is an exceptionally rare Pokémon. Though its diet is unknown, one Lucario was seen eating Berries and plants, like roses. It has been seen eating chocolate, even though chocolate is not part of its natural diet.