Lucario is a playable character in the fighting video game, M.U.G.E.N Trilogy. It was confirmed along with the other characters who appear in Super Smash Bros. Brawl on March 20, 2015. Daisuke Namikawa (Japanese) and Sean Schemmel (English) provide the role for Lucario in this fighting video game, using voice clips recycled from Super Smash Bros. 4.
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.
How to Unlock
Use Lucario's Super Smash Bros. amiibo or scan Lucario's AR Icon from the M.U.G.E.N Trilogy website.