This is entirely based on whether or not your Lucario is going to be any more detailed than in the given image (eyes, smaller details for the fur/skin/whatever the fuck it is, shading, etc.). If that is your final product for Lucario, the aura sphere looks way too 'realistic' in comparison to the very simplistic design of the Lucario. Not exactly sure what the purpose is of the red squiggles, as it just makes it look a bit sloppy, no offense.
Now, I'm no artist, so take my opinion lightly. I am but a fool when it comes to artistic shit.