Originally Posted by Tokyokit
Mine didn't ddo this. Do you have to beat the E4 or something?
I think so. When I was first in Canalave, the Cresselia opportunity was void. The only navigation available was from Canalave City to Iron Island. Even after I defeated Byron I couldn't go. The nexr time I tried was after I defeated the Elite Four, and this worked. Therefore, my conclusion is that defeating the Elite Four is key to getting Cresselia.