Description: No point in putting a physical move when you have Modest. If you want priority, go with Vacuum Wave. Nasty Plot makes Lucario into a power sweeper. Aura Sphere is STAB, Psychic and Dark Pulse are coverage, and Vacuum Wave is priority.
This is a good moveset for lucario (Pokemon #448) with the steadfast ability/trait, a Modest nature, and equipped with Life Orb submitted by Reshiram. For use in competitive Pokemon battles featuring an Export option and breeding guide.