Lucario can sense and manipulate , a form of energy emitted by all living things, and understand human speech. As a result, Lucario can read the thoughts and movements of other beings by sensing the Aura that they emit, to the point that it can even see otherwise invisible foes. Lucario is somewhat of an empath; when properly trained, it can accurately identify the feelings and emotions of others over half a mile away. Lucario has a pre-evolution called Riolu, which is a pure Fighting-type Pokémon rather than a Fighting/Steel-type Pokémon and cannot manipulate Aura as capably as Lucario due to its lack of experience.