The Ingredients:
Coconut Milk - from the vendor when you arrive
Creature Bone - in the underground ruins
Key Ingredient - in the underground ruins
Other Stuff:
Grass Skirt - on the beach at Booga Bay (need for the medicine man)
Shark Fin - on Main Street (not needed)
Hammerhead's Journal - in the Shark Museum
Translation Page - on top of the ruins
you give a poison coconut to the shark after you got all the ingredients.
you hav to finish all the other islands first
You have to collect all the pieces of the missing page of the journal.
go down into the ancient ruins and all the way to the left there will be the temple
All you have to do is go to the medicine man, and just talk to him. Then he will know that you will have all of the ingredients.
You have to go to the blue guy and he will mix all of your ingredients together, and he will give it to you inside a coconut and all you have to do after that is feed the shark and then you can go across the ocean and you can get the crying mom's little boy and you will defeat the island.
You have to go to the crazy man, on top of the tree. Collect all the items he tells you, then go back to the top of the tree and he will give you a special coconut that you shoot at the shark.
There is at least one, sunk in the lagoon. The cargo is all over the place and there's no way to fix it anyway. (That's not how to beat the island.)
You simply just click on him and give an ingriedient to him, but you need to have all the ingriedients. Make sure you put on a grass skirt (from Booga Bay vendor) so the medicine man will talk to you.
You have the medicine man mix a sleeping potion, using coconut milk, a creature bone, and a key ingredient. The bone and green ingredient are down in the underground ruins. Once you have it mixed, you fire it from the shark feeding Coconut Cannon at Booga bay. (see related questions)
First you need to solve the code for shark tooth island then after you need to go left after and the tunnel is all down there. Hope it helps! :)
On Shark Tooth Island, the translation key is the missing page atop the ruins. On Nabooti Island, the Sphinx symbols are all matched, not translated. (see related questions)