Need help!

When you get to canalave city go to the sailor standing in front of tyhe boats on the left side of town, and talk to him. He'll take you to Iron island, once your there follow the path till your in a cave. In that first, or second area there should be a man named Riley standing there. When he teams up with you, make your way through the cave.

Eventually, you'll come to a part with two team galactic members, battle them. After you beat them, Riley will tell you how happy he is that the people were gone. To show his gratitude he'll give you a riolu egg. To receive the egg, you must have one free space in your party. After you get the egg run around with it, till it evolves into Riolu, the baby form of lucario.

Go to Canalave City's dock, on the left side of town beneath the Gym, and talk to the sailor. He will ask if you want to sail anywhere, say Iron Island. When you get there, go up the mountain and go in. Go down the right stairs and make your way to the elevator. Once down, go to the left side stairs and go down. Talk to the guy in the blue clothes, his name is Riley. Team up with Riley and go back up the stairs and go across down the other stairs. Work your way through here and beat the Team Galactic grunts at the end. Riley will give you a Riolu (evolves into Lucario)egg, if you have at least 1 free space. Head down and make your way out. Walk somewhere around 3,200 steps and the egg will hatch! Level it up to level 33 I think, then it should evolve.

You get rioulu's egg on iron island.

You recieve the Riolu egg from a guy at Iron Island after walking through it with him. You must clear out your party before receiving the egg or going to receive. (or leave one spot empty).
You get Lucario from evolving Riolu from the stages of friendship.