When Ash and his friends encounter an injured Riolu, they want to help it. But this is no ordinary Riolu. It's afraid to trust Ash, and with good reason: Riolu's on the run from two different groups of Pokemon poachers, including ruthless Hunter J.

Now it's up to Ash to win the little Fighting-type's trust. Because the move that makes Riolu so special just may be the only thing that can save it. . . .