Help Riley out in Iron Island. After you defeated the Galatic Grunts Riley will thank you and he will give you a Pokemon egg that contains Riolu. Hatch the egg.
Go to Canalave City, and go to the sailor at the southwest part of the city. Talk to him and he'll say "Ahoy, wanna set sail?" Choose Iron Island. On Iron Island find Riley. When you get to the end and have finished killing the grunts and paled them, have a space in your party and he will give you the egg which hatches into Riolu.
you cant catch it in platnium but you can trade it
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.
Barboach
from Pokemon FireRed
You can get a Riolu egg from Riley after you defeat the galactic grunts in iron island. Make sure you have room in your party for the egg though. Then riolu can evolve after you max out its happiness and level it up during the daytime.
You can possibly get riolu in Pokemon black
Riolu is a Fighting type pokemon.
You can't find Registeel in Pokemon Platnium. You just migrate it in Pokemon Ruby, Pokemon Sapphire, and Pokemon Emerald.
There is no 'platnium', but you can find it on wild pokemon.
you cant catch it in platnium but you can trade it
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.
Riolu is 4 generation Pokemon. You can get egg only in Pokemon Diamond and Pearl
the most wanted in this houshold is Pokemon platnium
The Pokemon before riolu is Unown.
Catch a Riolu and evolve Riolu.