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Etherus sentire
Etherus emanatio


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

Kingdom – Pokémonia
----- Sub-kingdom – Animalia
Group – Terramamus
----- Sub-group – Homonimimus
Element – Combatamechana
----- Sub-type – Adamasinteri
Family – Etherus
This is an edit of an old essay that I wrote for the Encyclopaedic Pokémon thread on Serebiiforums, where a number or writers submitted scientific reports of Pokémon from a real-world point of view.

I've revised it and posted it here for submitting to PokemonProfessors

Lucario's scientific name means "Aura feeling" and Riolu's means "Aura emanation"
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eddfan1998 Featured By Owner May 9, 2016  Student Artist
Plz do a report on these Pokemon-

-Mightyena and Braixen
mixmane Featured By Owner May 2, 2016  Student
Vary neat and well thought out, I like it.
SparklySylveon Featured By Owner Oct 23, 2015  Hobbyist Traditional Artist
HaloPrime Featured By Owner Jun 29, 2014  Hobbyist Digital Artist
Just wondering, what the hell is the texture of the black parts of his body (minus his feet)? The mask, the dreads, the shoulder things, the brim on the waist, and maybe even the paws (hands). Are they all the same texture or are only some parts similar? But seriously, what the hell are the dreads made offfffffff
Electric-Raichu Featured By Owner Apr 5, 2014  Hobbyist Digital Artist
Pretty good.

Only thing is about pregnancy, AFAIK Pokémon lay eggs, so I don't think there is a pregnancy as such, at least not a long one.

Good theory about why it's a steel type. I was wondering that.

Do you know if the spikes serving any defensive or offensive purpose?
risingstar1011 Featured By Owner Dec 6, 2014
They are almost assuredly psychic energy focus points, much like the Gardevoir line's red 'spikes'.
Babyjoshy5 Featured By Owner Jan 28, 2014  Hobbyist General Artist
:O_o: ... ... ... okay that's f****d up...
TheGoldenMoon Featured By Owner Sep 6, 2013
Seeing that the lucario can run at a top speed of 46.6 mph (75 kph ) (Google) and the average human can sprint 12 to 15 mph and run long distance at 6 mph (athletes run long distance at 10 mph)(…) , wouldn't that mean it's heart and lungs would have to be larger than the average human's in order to reach that speed similar to a cheetah's *runs a top 64 mph and also has larger heart and lungs(…)* ? If that's the case, because of its small rib cage (based off the illustration above), the cartilage that connects the ribs to the sternum that allows breathing and protection of the heart would have to expand much more than the average dog in order for large air intake as well as make more room for the heart to sufficiently pump blood unless they have a broad chest. The lucario form the movie clearly had a broader chest than that in the illustration posted on top. Now, under further research, a Greyhound can run up to 40 miles but has been clocked at 45 mph (…) . However, that's because the greyhound runs an all fours. A lucario mostly runs and stands on its hind legs. Plus, it's a high jumper and can climb mountainous terrain, which means that the heart and lungs would have to work much harder in order to reach the top 47 mph as well as climb very tall mountains. And I don't think a small heart and lungs would bold well. A little food for thought. (thought I'd post the same comment here too just in case ^^;       )
TheHil Featured By Owner Oct 9, 2012
This should totally be studied in biology class. Not only because it's about my favourite character ever, but also because it's really precise and realistic.
The only thing i feel should be different is the age: Not because he's my favourite Pokémon, but because, as you wrote, they rarely fight when it's too dangerous, and they have almost-unbreakable bones, meaning that they rarely get injured, this should enlarge their lifespan of something more than 40 years... I'd say it's 60 on the wild and 80/90 with a trainer... Also they tend to meditate a lot and all that stuff... At least that's my point of view, of course this is your idea and i can't order you to change it, but that's just my feeling on that note. For the rest... I think it's perfect as it is. Again, very realistic.
Rover-accityfolk Featured By Owner Aug 14, 2012  Hobbyist General Artist
Amazing detail and clarity :) You could have mentioned how Riolu, though small in stature, possess above average stamina of most Pokemon belonging to the Combatamechana element as it is capable of traversing over vast landscapes in the time limit of one night.

It's bone diameter. A lightweight skeletal system helping with easy volition. This has benefited development of a unique fighting style, using both force and grace.

As you can see, I am a fan of Riolus.
Chibi-Pika Featured By Owner Aug 19, 2012  Student General Artist
Hehe, I can tell. I actually originally wrote this in the early days of DP and had even less info on Riolu than it does now. o.o But even after editing it, it's obvious that I didn't take the time to overanalyze Riolu the way I did with Lucario. xP I like the points you brought up.
Rover-accityfolk Featured By Owner Aug 19, 2012  Hobbyist General Artist
Your welcome :3
verzenard Featured By Owner Jul 6, 2012
Wow, what a great read, I bet U would win something if Pokemon were real.
Lucariolus Featured By Owner Jul 5, 2012
...mother of aura...why did I not see this sooner...
chammy3760 Featured By Owner Jun 30, 2011  Student General Artist
I wish I had found this earlier. I could have used it in my story. I had a group of ten breeding pairs of Lucario gathering together in a single location to raise their young...your theory makes so much more sense.

Unfortunately my entire plot hinges on the events that occurred at the Lucario breeding ground so I can't exactly change it.

I'll continue to come back to this and use what I can. Maybe I'll end up saying somewhere that it really isn't typical behavior for Lucario to congregate, and make that another plot point.
chammy3760 Featured By Owner Jul 14, 2011  Student General Artist
Got it.
I already noted that there was a time flower in that location, I'll say that it also somehow shifts that location out of time, and that the Lucario found there were all from different time periods.

No wonder they like temporal anomalies so much in star trek, they can fix all kinds of plot holes...
Shinwa-Tsuki Featured By Owner Apr 1, 2011
Very nice!

I do know, that I will end up using this to help - particularly when I write fanfiction {If I decide to use this}.
Ro9ge Featured By Owner Dec 6, 2010
Interesting how you say Riolu can't sense aura. I always imagined that they could use aura, just not to the extent as Lucario can.
grayracer83 Featured By Owner Sep 13, 2010  Hobbyist Writer
well done. not only through , but fun to read. :)
madgenius2013 Featured By Owner Jun 15, 2010  Hobbyist General Artist
What about the event Riolu in the games that knows Aura Sphere and can sense it well?
StormofThunder Featured By Owner May 1, 2010
Wowwww... this will REALLY help me too! 8D

Very interesting and well written, and it keeps me reading and reading. C:

Good work :la:
LucarioFan1996 Featured By Owner Apr 3, 2010  Hobbyist Artisan Crafter
Wow. Just. Wow...I was blown away with all of this information....INCREDIBLE!!!!!!!! :iconlachoirplz:
ThatOneSaint Featured By Owner Feb 7, 2010
SmashBrosDude Featured By Owner Feb 3, 2010
No you didnt do it right You have to have the full scientific name
Oh-Ninja-Please Featured By Owner Feb 3, 2010  Hobbyist Traditional Artist
Awesome!!! Will you write one for riolu aswell? :D Hey have you read any of the new group updates? anyway youve been promoted to observationalist status as well as been issued an invitation to become a contributor... you will need to decide on a tree name to take as your title which you could tell me now or contact =pandemoniumfire Thanks and well done :D
BoltFraction Featured By Owner Feb 2, 2010  Hobbyist Digital Artist
Ah, reading this really makes me want to start the report I've been formulating for who knows how long...but I have too many other projects to finish first! Including other stories!
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