How to get Dialga and Palkia

                                                                   
Requirements: Adamant Orb, Lustrous Orb (BOTH SHOWN IN THE VIDEO) Recommended: Repels.            

This video will show you how to get them. Its very easy if you get their HP really low. Don't waste masterballs, use duskballs. By the way, if Cynthia doesn't show up in Celestic Town in that cave, it WILL still work. But you need to get the orbs. This video will show you how.