Lucario is a dual-type Fighting/Steel Pokémon introduced in Generation IV.
It evolves from Riolu when leveled up with high friendship during the day.
Lucario can Mega Evolve into Mega Lucario using the Lucarionite.
Lucario is considered to be prideful and is extremely loyal to its Trainer. It also seems to have a natural sense of justice. It usually lives deep in mountains very far from people to improve their skills. It is an exceptionally rare Pokémon. 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, even though chocolate is not part of its natural diet.