Lucario is a bipedal canid Pokémon sometimes referred to as the "Guardian of Aura" or the "Wave-Guiding Hero" for its energy-sensory and manipulation. Its structure is vaguely humanoid with a thin waist and large hind legs, much like Blaziken. The skull is unique-its snout protrudes outward from the face, but the mandible only reaches about halfway, resulting in a prominent nose. Its eyes are large and angular, with vivid red irises. The ears are long and delicately controlled by many different muscles. Like humans, it has a rotating shoulder joint, only surrounded by a thick bone cuff. Bone spikes jut out from its wrists and sternum. Like all canids, Lucario walks on its toes. The bone structure in its legs is highly unique, with its femur and foot bones both nearly twice as long at the tibia. Its thigh muscles are the largest and most powerful in its body, giving it the ability to leap nearly ten times its height. Lucario is quite colorful, bearing a light-yellow torso, black paws and face, and blue legs, arms, ears, and tail. Its face has a distinct mask-like marking formed from the band of black fur over the eyes and snout. Most of its fur is very short and coarse, save for the long, silky fur around its neck and torso.
Abilities and Traits
Lucario's most distinctive trait is its unique sensory organs. On the back of its head, it possesses two pairs of incredibly sensitive nerve bundles commonly referred to as Aura Sensors. They hang limply most of the time and are raised to the side when in use. The Aura Sensors can detect the energy comprising all matter, but are particularly keen at detecting life energy, known as Aura or Wave. In effect, a Lucario can use them to perceive its entire surrounding, even to see things that would normally be far out of its actual vision range. Lucario does not rely on them constantly, however; its other senses are adequate. Its hearing is incredibly acute, its sense of smell is good (although weaker than other canines'), and its eyesight is about the same as a human's.
Fighting/Steel is Lucario's official element classification. A great deal of its energy is linked to its muscles, like that of all Fighting Pokémon. Within the Steel type, there are two subtypes: internal and external. External Steel types such as Steelix, Metagross, and Magneton exhibit an organic metal compound in their hides or certain appendages. Internal Steel types such as Lucario, Mawile, and Jirachi have metal-based skeletons. Lucario's bones are nearly impossible to shatter, but despite this, the skeleton is remarkably light. Most of a Lucario's body weight is comprised of muscle.
Lucario's combat skills are breathtaking to witness, yet a rare spectacle, as Lucario can sense danger beforehand, and will usually flee rather than fight. Its Aura Sensors are always active in battle, allowing it to locate its opponent no matter what. With a series of agile leaps and bounds, it evades enemy blows at the last second and doles out powerful kicks before generating a ball of Aura energy within its paws and firing it as a projectile.
Lucario have most often been observed in forested mountainous regions, especially those with a high concentration of energy (with the same unique configuration as Pokémon) in the earth. They are omnivores, feeding both on berries, roots, and small creatures. Lucario are very endurant, and can run for hours on end without tiring. In short bursts, they can sprint at up to 75 kph, making them one of the fastest bipeds in the world. They communicate using a number of growls, grunts, and purrs, but there have been accounts of some Lucario actually mastering the Aura enough to project their voice through telepathy. Lucario are long-lived, usually reaching 40 years of age in the wild and 60 years when owned by a trainer.
Social Interaction and Reproduction
Lucario are primarily solitary creatures, and rarely interact with others, even of their own species. Occasionally, male Lucario will scout out the lands surrounding their territory, using Aura to sense if there is a female nearby. Upon encountering, the two spar on and off for days. If the male loses, the female will usually force him out of her territory. However, if the female loses, he may enter it whenever he feels. From that point, the two will have many more battles upon each meeting, only less fierce than the first. After several weeks of interaction, two will mate. The female remains in seclusion during the pregnancy, and the male must protect both their territories.
Young Lucario are known as Riolu. Their ears are much shorter, and they lack the spikes, arm cuffs, and glossy yellow chest fur of the adults. Nerve bundles hang from both sides of their face, but they cannot sense Aura, instead having an acute sensitivity to warmth and the physical signs of emotion in others.
Even before leaving its parents, the Riolu will exhibit remarkable independence. It will remain within its parents' territories until reaching maturity, but does not require much active care, preferring to find its own food, even if its foraging attempts fail. Mated Lucario raising a Riolu will take turns scouting their territories and watching after their pup as it tries to fend for itself. Despite its resolve, the Riolu will often return to its parents' den at night. After several years, the young Riolu will eventually feel compelled to strike out on its own. It may be fully grown, but it is one of the few Pokémon that cannot reach sexual maturity without evolving.
Unlike most Pokémon, Riolu do not evolve into Lucario through battle experience. Most Pokémon reach their higher form by building a high level of strength, which triggers a hormonal reaction that alters its energy signature, starting the evolution process. With Riolu, this hormone is only released if the Pokémon is feeling little to no stress, a process known as Happiness Evolution. Curiously, the hormone is inhibited at night. Amateur researchers might point out that the highly-combative Pokémon lifestyle should be highly stressful, but must remember that Pokémon have an instinctual need to strengthen themselves. However, it is worth noting that Riolu almost never evolve in the wild, which is one of the reasons why this Pokémon is so rare.
Although all Lucario have the ability to use Aura, they are never taught how by their parents, and must master it on their own. Because of this, it used to be quite common for Lucario to come in contact with humans, despite their solitary nature. About one in ten thousand humans possesses the ability to use Aura, although they are never able to do so unless the trait is realized and honed. This was discovered over a thousand years ago, and for some time, it became quite common for children with the Aura to be trained by nobles to become knights. Likewise, young Lucario often willingly came into captivity in order to master the Aura by training under human Aura users. This practice ceased around 300 years ago.
Full Taxonomic Classification
----- Sub-kingdom Animalia
----- Sub-group Homonimimus
----- Sub-type Adamasinteri