Lucario artwork

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-type and Steel-type Pokémon. Lucario evolves from Riolu during the day if its happiness has reached a certain point. It specializes in attacks that use Aura energy, like Dark Pulse and a can't-miss technique, Aura Sphere.

Pokemon Diamond/Pearl