Suddenly the Riolu starts to glow and a few seconds later he looks over himself to see that he is now a Lucario. You notice the stomach is slightly more roomy after something changes about him. "Yes! I've finally evolved!" He shouts, looking down and admiring his new form. He pats his belly with a smirk. "It turns out you did help me evolve." He teases, happily turning the tables. You both panic a little and worry about your future.