Help with Kingdom Hearts one PLEASE?? I'm stuck? 10 points to whoever gets me to hollow bastion

I have all the places locked but I can't open hollow bastion and I can't get to Pooh to help him find his friends. Can someone help me, I have gameFAQs but it is not helping me alot. Apparently I have missed something and I don't know what. Can someone help me please please please?????? 10 points to whoever gets me to hollow bastion