Lucario is a fictional character from the Pokémon franchise, created by Game Freak and published by Nintendo. It is a dual-type Fighting and Steel Pokémon, known for its ability to sense and manipulate aura, which is the life energy of living beings. Lucario evolves from Riolu when leveled up with high friendship. First introduced in the Generation IV games, Lucario has become a popular character in the series, appearing in various games, animated series, and movies. It is recognized for its humanoid appearance, blue and black coloration, and signature move, Aura Sphere, which allows it to unleash powerful energy attacks.