On Iron Island, a guy named Riley will give you an egg. It will hatch into Riolu.
riolu
no
A Riolu, which can evolve into a Lucario.
No, but Lucario can.
Riolu lucarios prevolution
Riolu evolve's normally and pichu evolves through happie'ness
feed it poffins, battle with it alot,
you get a riolu which can evolve into lucario
Riley will give you and egg on Iron Island
go to iron island and find riley. go battle the team galaactic guys and after he will give you a riolu egg then just hatch it to get riolu
to get a Riolu egg in Pokemon platinum you have to go to iron island by taking the ferry from Canvalve city then find riley in the cave and battle with her. then at the end she will give you the egg but you must have room in your party.
from Riley he gives you a Riolu egg and you can evolve it at high friendship