first, you have to beat the elite four.
then, you go to canalave city and talk to the sailor that takes you to iron island.
next, he will ask you if you can get the lunar wing for him and he will take you to fullmoon island and you have to go to the opening to the right of the island and talk to cresselia and she will fly away. an item will be there. its the lunar wing. take it to the sailor and he will take you back. if you havethe marking map and the map poketch's cresselia will appear and you can chase her like mesprit.
on fullmoon island
I think you mean Fullmoon Island. Fullmoon Island is where you encounter Cresselia. It is a roaming Pokemon, so you can't catch it there.
to get to fullmoon island you have to get the card key for a door but you need to get in a special event that is already over.
Unless you go to fullmoon island, you can't get darkrai
See every Pokémon in Sinnoh.
there is none. that is what i know from diamond. in pearl, its probably the same. - ho-ohawesomeness
Look on serebii pokearth
Fullmoon Island can be accessed only after you beat the Elite 4. You must talk to the Sailor in his home.
Go to Fullmoon Island. Or Use I Cheat. But do the complicated one. I cheat Is STUPID!!!
yes there are, new moon island,fullmoon island,turn back cave and i thinks that all
well if you have an action replay you go to the other islan walkor runright and then you are at fullmoon island
new moon Island or fullmoon to get it you need infernape, torterra and empoleon all level 1 its easy