It's incredibly funny that the Lucario movie made this whole plot about how Ash has aura powers and that he is descended from these super powered guardians that could manipulate aura like Lucario. You would think that this would be a one-off thing in this movie that is never brought up again right? Wrong, his powers stay for the rest of the series and are the key plot points in several arcs and by the end of the series he has completely mastered it. Its crazy.