Riolu evolves into Lucario at level 28-30 or so.
Riolu evolves at maximum happiness, not at any specific level.
riolu evolves at level 32.
Riolu evolves at max Happiness during the day.
riolu evolves when he is really happy
riolu
Riolu evolves with Happiness but only during the day.
At this point in time, Lucario is its final form. It does evolve from riolu.
You have to have a close bond or friendship with your riolu.
it evolves by high friendship
32
Riolu evolves from happiness. If he's really happy he will evolve. Normally around levels 26-34.
Riolu evolves if it is at maximum happiness and levels up (at any level) during the day time.Riolu evolves with maximum friendship in Pokemon Heartgold.