I have no doubts in my mind that there have already been a million drawings of Lucario with a shame-cone on his head... but I couldn't find any.
So, yeah, I drew that Lucario and Riolu father-son duo from another one of my drawings. They weren't supposed to be re-occurring characters or even characters at all, but I just loved drawing them so much that I wanted to draw more of them. So I guess they are now my OCs I guess.
The Lucario is named Sazi and the Riolu is named Branque. Storywise, this Lucario is the one that features in the Super Smash Bros. Games. When he isn't fighting in tournaments he's spending time with his boy, raising him to be a good person. In this drawing, he got Down-Tilted too hard and needed to take a break.