Actually Riolu doesent learn it. Lucario does. As soon as Riolu evolves (Lv. 20 or 30) it learns Aura Sphere. A pretty handy move that never misses.
Chat with our AI personalities
yes. If your riolu evolves after level 37 it will not learn aura sphere. lucario learns aura sphere at lv 37
Riolu first has to evolve into Lucario in order to learn Aura Sphere. However, if you own Pokemon Ranger: Shadows of Almia you can download a special mission called Rescue the Kidnapped Riolu through wifi. After you complete the mission you are able to transfer a special Riolu that knows Aura Sphere to Pokemon Diamond, Pearl, or Platinum versions.
IN POKEMON PLATINUM, MY LUCARIO HAD TO WAIT UNTIL LEVEL 37 TO LEARN AURA SPHERE. YOU MAY BE ABLE TO LEARN IT EARLIER IF YOU WAIT TO EVOLVE YOUR RIOLU =)
stop trying to cheat!
riolu deosn't learn this move, but lucario does, you have to evolve once you beet darkria and go to electavire and go under remember and aura sphere will be under it [P.S. if your starter Pokemon is a riolu the only way to evolve is with a sun ribbin which is hard to get, so to make it easy go to this website www. Pokemon explorers of the sky wonder mail s generater .com