Lucario | Trapped and injured

Lucario is a bipedal, canine-like Pokémon with predominantly blue and black fur. It possesses a short, round spike on the back of each forepaw, in addition to a third on its chest. It has red eyes, a long snout, and ears. When its mouth is open, two pairs of pointed teeth, one in the upper jaw and one in the lower, can be seen. It possesses cream-colored fur on its torso and blue fur on its thighs that resemble shorts. It has a medium-length tail of the same blue color as well. It stands on its toes rather than on its entire foot. It has developed four black appendages that hang down from its head, which rise when Lucario reads or manipulates aura, a special energy that it senses; these appendages are very similar in shape and number to the four pink appendages on the head of the Being of Emotion, Mesprit. Lucario can use its powers to create a staff in the form of a bone and use it to fight.

Lucario can study auras to predict the movements of its opponents and track their quarry. With sufficient training, a Lucario can read auras to understand how living beings are feeling from more than half a mile (1 kilometer) away. However, Lucario sometimes ends up learning information that it would not like to know, causing it to get stressed out easily. It also has the power to manipulate this energy in an offensive manner, in the form of explosive spheres of energy. Lucario sometimes can understand human speech and has been reported to be able communicate with humans through telepathy.

Mostly the Lucario are considered to be prideful and is extremely loyal to its Trainer. It also seems to have a natural sense of justice, as it only trusts Trainers with righteous hearts. It is an exceptionally rare Pokémon that usually lives deep in mountains very far from people to improve their skills. Lucario are primarily carnivores, hunting their prey in packs, though one Lucario was seen eating Berries and plants like roses. It has also been seen eating chocolate, although chocolate is not part of its natural diet. As mentioned in the Sleep Style Dex, Lucario never lowers its guard, even when sleeping. It is believed Lucario reads the aura of others while asleep similarly to when it is awake.

But, some wild Lucario are very hesitant and standoffish around humans after being chased and threatened by humans. He usually will refuse and try to escape being caught and/or tamed. Despite this, he is still very protective towards those who might be weak or lost.