Ash does not get riolu but it does follow him in Pokemon ranger and the kidnaped riolu and Ash wants to bring him back so he does alitle bit.....
He should as riolu will assist him in his aura techniques....
No, not yet.
Lucario is evoled from riolu and can be obtained by going to iron island and helping rily or watevz and bring her to the end she gives you a riolu egg!(obtained in pokemon diamond/pearl/platinum)Hope it helped :)
Hopefully no. Lucario and Ash were in the same movie, 'Lucario and the Mystery of Mew', and Lucario was given the lead role in it, so I doubt Ash will catch one, but one may 'join him on his adventures'.
You can get riolu by releasing 5 lucario's at the release point you will get a riolu ticket use it at the recruit point to get riolu.
At this point in time, Lucario is its final form. It does evolve from riolu.
The Pokemon before riolu is Unown.
Catch a Riolu and evolve Riolu.
You can possibly get riolu in Pokemon black
riolu evolves at level 32.
Riolu weigh 44.5 lbs.