the girl on iron island has one.
You don't see it. You have to hatch it from the Egg you received from Riley on Iron Mountain.
In Pokemon Diamond and Pearl the only way to get/see Riolu is in an egg. You can get the Riolu egg from Riley in Iron Island. You must have an empty space in your party then go through it with him and defeat a few Galatic Grunts. Then you will receive an egg, when it hatches you will have a Riolu. This is the only way to see/own it in the game. I hope this answers your question!
you have to catch all of the pokemon in diamond or SEE all of the pokemon
You have to get his sheen (happieness) all the way up then grow it a level. See what kind of poffin it likes.
To finish the sinnoh dex (Pokemon platinum's,diamond, and pearl dex) you just need to see every Pokemon not catch every Pokemon.
To see check out www.psypkes.com/:) hope it works!!!
No!,you just need to see them
slather a tree and hope for a cherubi. catch and evolve.
Yes if you want to finish the Sinnoh and the National. You have to see it and obtain the Pokemon info
You have to see all 150 Pokemon, you don't have to catch them. After that go to Professor Rowan
you have to get the national dex when you see all 150 Pokemon orif you play platinum you will have to see all 210 Pokemon
In Soul Silver you can't catch Lucario but you can catch Riolu(Lucario's Pre- Evolved form) in the Safari Zone near the meadow Area If you place down 10 Forest objects and 14 Peak objects down. You can Evolve the Riolu and you will have Lucario!! Or If you have Pokemon Diamond or Pearl or maybe Platinum you can go to Iron Island and help Riley get to the Exit. He will give you a Riolu egg you can then evolve it and then trade it to your Pokemon Soul Silver that's what I did..... I have Pokemon Soul Silver, Heart Gold, Diamond,Pearl,Riby,Sapphire,Emerald,Silver,Gold,Crystal, Blue and Fire Red. Hope it Helped ^^ -Bolt the Electric Lucario