Lucario (ルカリオ, Lucario) is a fictional creature from the Pokémon series. It debuted in the series' fourth generation, and represents that generation as a playable character in Super Smash Bros. Brawl, Super Smash Bros. 4, and Super Smash Bros. Ultimate.
Lucario is a bipedal canine Pokémon, and is categorized within the Pokédex at #448 as the "Aura Pokémon". Lucario is a dual Fighting/Steel-type Pokémon and the evolved form of Riolu; in the Pokémon core series, Riolu evolves when it gains a level while having a sufficiently high amount of friendship rating and only during morning, daytime, and afternoon hours. Lucario is able to detect and wield Aura, a spiritual energy that surrounds every living thing.
According to the Pokédex, by picking up on the Aura emanating from others, it can read their thoughts and movements; a well-trained Lucario, in particular, can sense and read the feelings of creatures over half a mile away. Lucario also understands human speech, and is even capable of communicating telepathically in human languages.
Lucario's rare typing, useful moveset, and impressive offensive and speed statistics have allowed it to maintain its status as an esteemed Pokémon in the competitive Pokémon scene ever since its debut. Despite being one of the most prominently marketed fourth generation Pokémon in the lead-up to the release of Pokémon Diamond and Pearl Versions, it has no relevance in the games' story whatsoever.
However, Lucario is notable within Kalos, the setting of Pokémon X and Y, the first games within the series' sixth generation. In Kalos, Lucario is renowned as the first Pokémon to have achieved Mega Evolution in the region. This is reflected by its significance to the plot of X and Y: it is the first Pokémon the player initiates Mega Evolution with, and a very large statue of its Mega Evolution, Mega Lucario, is a centerpiece within the Tower of Mastery.
While holding a Lucarionite, Lucario can undergo Mega Evolution to become Mega Lucario. As Mega Lucario, its already impressive offensive and speed statistics are boosted considerably, and it gains Adaptability as its ability, which further supplements its offenses.
As a playable character
Main article: Lucario (SSBB)
Lucario is unique in that the more damage it takes, the more damage, range, and knockback its own attacks have (based on the actual ability of most Lucario in the Pokémon series). This only applies to its Aura-based attacks, which are noted by bluish, flame-like wisps. A few of Lucario's attacks do not use Aura, such as its dash attack and back throw, among others. This trait makes it not particularly useful at the beginning of a stock, but by surviving to a high level of damage, it becomes considerably lethal. It possesses the ability to both wall jump and wall cling; its wall jump in particular is by far the highest in the game, and the height gained by this scales with Aura.
Aura Sphere, its neutral special, is a chargeable ranged blast comparable to Samus' Charge Shot. Force Palm, its side special is a short-ranged blast, or at point-blank range, a throw. ExtremeSpeed, its up special, is a non-damaging recovery move and will propel Lucario in any direction aimed. Double Team, its down special, is a counterattack that is Aura-based and has a damage output that caps at about 15%. Lucario also has a fighting style similar to Mewtwo's fighting style in Melee, resulting in rumors that it "replaced" Mewtwo.
Lucario is currently ranked 11th on the tier list, placing it in the C+ tier.
An Aura Pokémon. It can track energy called Aura, which is given off by all living creatures. It's a unique combination of both Fighting and Steel-type Pokémon. Lucario evolves from Riolu during the day if its happiness has reached its maximum point. It specializes in attacks that use Aura energy, like Dark Pulse and a can't-miss technique, Aura Sphere.
As a playable character
Main article: Lucario (SSB4)
Lucario returns as a playable character in Super Smash Bros. 4. Physically, it has been updated to have its proportions more akin to its appearances in Pokémon X and Y. Lucario also has a new Final Smash, Mega Lucario, which replaces Aura Storm. Sean Schemmel, the voice actor of Sir Aaron's Lucario from the film Lucario and the Mystery of Mew, confirmed that he would be reprising his role as Lucario in the game.
Lucario is currently ranked 17th out of 55, placing it in the B tier. Lucario's Aura mechanic has been strengthened in the transition from Brawl to SSB4, and it now affects Lucario's entire moveset. When coupled with the new rage mechanic, Lucario has the potential to KO any opponent at early percentages when its own damage percentage is high. The changes to hitstun canceling have also granted its up and down throws impressive combo potential. However, Lucario also received some nerfs. Its smash attacks in particular are slower, while Force Palm and its neutral, forward and down aerials have worsened combo potentials. Extreme Speed also saw a large increase in ending lag if it ends in the air, leaving Lucario highly open to punishment upon landing on the ground. Regardless of the nerfs, Lucario is still viewed as a viable choice for competitive play, thanks to it achieving decent results.
As a playable character
Main article: Lucario (SSBU)
Lucario is a playable character in Super Smash Bros. Ultimate. Similar to its debut in Brawl, Lucario is an unlockable character instead of a starter like in SSB4; however, unlike in Brawl where it was encountered later on in the unlocking process, Lucario can potentially be the first character unlocked in the game as the first character in Yoshi's Classic Mode character unlock tree.