Hi, I just want to ask if someone knows how exactly Jolene spawns in the map when you go to Zauz's Island to get the Phantom Sword.

It's just a little bit annoying because there are times that just appears when you arrive to the NW sea and there are another times that you have to wait at the sea for her spawn....

Thanks.

Are you talking about at the very end of the run while you're getting the Phantom Sword? If you're playing on the Japanese version, she will always spawn up there. On any other version, you need to savewarp to make her appear faster, and then savewarp again to get back to the island after fighting her.