Se dice que es valiente y perseverante. Duerme de pie imitando a Lucario, quizás esforzándose una vez más con su futura evolución en mente.
Riolu is said to be tough and hard-working. The unusual position it takes when it sleeps sitting up - without even lying down - is just how Lucario does it. Perhaps Riolu is pushing itself hard, dreaming of the day it will evolve.