yes i think all of them are but im nat quite sure
There is not a legendary Pokemon, however Riley does give you a Riolu Egg.
No, no legendary Pokemon evolve from any game sometimes people consider lucario a legendary Pokemon and it evolves from riolu.
you cant, but you can trade it from platinum ,or ,you can ask a friend to trade with you ,or, i can trade you. or go catch a riolu anduse rare candy cheat ar
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.....
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.
No, Wayward cave in not home to any legendary Pokemon however, it is the place where you can find Gible whose final evolution at lv. 48 evolves into the psuedo-legendary Garchomp
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.