when you want to give him the scanner he is in the harbor house in slateport.he will give you a deepsea tooth that raises a clamperl's sp attack or a deepsea something i forgot but it raises a clamperl's sp def. your chooce.
You can't use it for much, but you can exchange it for either a deepseatooth, or a deepseascale. The deepseatooth raises Clamperl's Sp. Atk, and the deepseascale evolves Clampearl into huntail. To exchange the scanner bring it to Capt. Stern in Slateport at the Slateport Harbor.
Capt. Stern is not in Pokemon Leaf Green. He is only in Pokemon Ruby, Saphire or Emerald.
You first meet Capt. Stern upstairs in the museum, where team Aqua/Magma (I forget which) are originally blocking the doorway.
To get Gorebyss or Huntail you have to go to the Abandoned Ship and there you see a scientist who tells you that he is looking for a Scanner. You have to find the scanner and go back to him and he tells you to give it to Capt.Stern. Fly back to Slateport and give the scanner to Capt.Stern and he will give you a choice of the Deepseascale and the Deepseatooth. You have to choose one. Both increase the Sp.Ack and Sp.Def of Clamperl. If you give Clamperl the item and trade it. It depends on what item you take from the Capt. if you get Gorebyss or Huntail. Both are evenly matched.
Give it to capt. Stern in Slateport city. the boat house northeast of the Pokemon center.
That's how you get the items in the first place by giving capt stern the scanner.
The Deepseatooth is an item that you receive from Capt. Stern when you trade for the Scanner. If you give it to Clamperl to hold while trading, it will evolve into Huntail.
You have to beat Norman at the Petalburg Gym and the twins at Lilycove Gym to get HM's Surf and Dive. Then, go to the Abandoned Ship (you will see the ship when you ride from Dewford to Slateport on Capt. Briney's ship) and find the scanner. Then, show the scientist on the ship that you have the scanner and he will ask you to deliver it to Capt. Stern who is at the harbor in Slateport. Give him the scanner and in return he will give you either the deepseatooth or deepseascale (which ever you choose).
You can't find this item to get it receive the scanner in the abandoned ship and give to capt stern he will let you have deep sea scale or deep sea tooth pick the tooth.
when you want to give him the scanner he is in the harbor house in slateport.he will give you a deepsea tooth that raises a clamperl's sp attack or a deepsea something i forgot but it raises a clamperl's sp def. your chooce.
Give it to capt stern which he is near the SS tidal in slateport city. He will give you either a Deepseatooth or Deepseascale both of which evolve a clampearl to either huntail(tooth) or gorebyss(scale) oh and you must trade the clampearl while holding the item, choose wisely.
You can't use it for much, but you can exchange it for either a deepseatooth, or a deepseascale. The deepseatooth raises Clamperl's Sp. Atk, and the deepseascale evolves Clampearl into huntail. To exchange the scanner bring it to Capt. Stern in Slateport at the Slateport Harbor.
Go to the shipyard, and talk to the guy standing by the table with a map on it. He will tell you Captain Stern isn't there. Leave the shipyard, and go into the museum. Go to the backroom, and talk to the scientist. He is Captain Stern. Team Aqua will come inside, and be prepared for two battles. After you beat them, you can give the parts to Capt. Stern. Hope this helps! :)
He is in Slateport City.
The only way to find a DeepSeaTooth on Ruby, Sapphire or Emerald, is to give the scanner from the abandoned ship to Capt. Sterm in Slateport. When you do that, you can choose to get either the DeepSeaTooth or scale. In Pokemon Diamond and Pearl, you can get a new DeepSeaTooth on wild Carvahna or Shapedo. There is a 5% chance that one of these Pokemon will be holding one when you encounter it.
You can find a deep sea scale in Slateport City, Captain Stern will give it to you after you give him the Scanner which you can find on the Abandoned Ship.