Hatch Riolu

If you are very eager to hatch a Riolu then Adventure Sync reward would give you a sweet chance. Walk +50 km a week and leave one egg spot open when claiming the reward to give a high chance receiving a 10 km reward egg. That egg would give you a very high chance to hatch either Riolu or Shinx (I myself got a Shinx this way).

I've gotten 2 out of 4 post-Gen 4 10ks, one of which was adventure sync.