No. Rioru is merely a typo or a trick. Riolu's Japanese name is actually Riolu like every other language.
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If you want riolu to evolve, make him happy
Riolu weigh 44.5 lbs.
riolu evolves when he is really happy
Riolu evolves at max Happiness during the day.
Depends on the level but Riolu evolves into Lucario when it has high enough freindship and learns beter moves. That is true but I think Riolu is cooler than Croagunk so.. Riolu is better!!