How do you get to new moon island

In Canalave city up ahead the Pokemon center is a harbor inn (it will only be open in the morning.) There it will be the son's sailor spend a little time with him them go to sailor that took you to iron island, and he will be able to take you to new moon island and there you will find the legendary Pokemon darkrai catch him with any pokeball you want, it will be a lot more easy if you catch it with a masterball, but for me the ones that catch legendary Pokemon with masterballs are sissys. (So get your hineys off the couch and get an AR, then use the any-pokeball-as-masterball code.)