Where is Save the King in Kingdom Hearts 2

It is in the Hollow Bastion bit. Leave Merlin's house, run up the stairs and go through the entrance at the end (you will have to battle a couple of heartless). Once through there you will have to battle a few more heartless and then run forward untill you are on flat land. You can either walk to the left and battle a member of Generation X with the mental guitar or walk to the right. Walk to rhe right continue forward untill you see a step/passage on the left and walk up there. There are 2 chests up there on of which contained the recipe.