well after you rescue him on her nightmares by darkrai use the pokemap or something like that and then catch cresselia but be care full use the pokemon that knows -block-or-meanlook-for the pokemon cant get away
hope i helped
Chat with our AI personalities
first u have to talk to the boy in the bed and the mum then u go outside and talk to the sailor the u will go to fullmoon island then a Pokemon that Pokemon will drop an item you go and get the item and go back to the boy and he will wake up u have talk to the boy to wake when u have the item
talk to his dad go to island talk to cresilla it runs away it leaves behind a item go back use item on the boy
After you have defeated leader wake in pastoria city, Cynthia will give you a secretpotion, go to the psyducks and they will go away
i heard some one say you bypass the city and beat crasher wake then shell be there without finding her or you can try to find her your choice. I cant find her ether i beat crasher wake and shes still not there.....
Crasher Wake is in the very back of his gym in Pastoria City. He is a user of Water-Type Pokemon.