you have to beat the elite four then go to slateport and into the sailor's house. talk to the boy in the bed and then go outside. talk to the sailor and he will take you to fullmoon island. when you meet cresselia, it'll dissappear and leave a lunar wing. give it to the boy in the sailors house and he will get better. then you can track down cresselia with app number 13.
You can't find Registeel in Pokemon Platnium. You just migrate it in Pokemon Ruby, Pokemon Sapphire, and Pokemon Emerald.
There is no 'platnium', but you can find it on wild pokemon.
you cant catch it in platnium but you can trade it
the most wanted in this houshold is Pokemon platnium
It is Pokemon platnium.
Barboach
You cannot breed Cresselia. Cresselia is a legendary Pokemon, and you cannot breed a legendary Pokemon.
by-Pokeexpert980 The same as PEARL/DIAMOND/PLATNIUM 493
spell you trash 'platnium'=Platinum
you do not!
from Pokemon FireRed
you can get it in pokemon platinum!