After receiving the National Pokédex, the Deep Sea Scale can be found on wild Relicanth, Chinchou and Lantern. The Deep Sea Tooth can be found on on wild Carvanha and Sharpedo.
You must have a clamperl and let it hold the deepseatooth/deepseascale. Then, trade clamperl. If clamperl is holding the deepseatooth,it will evolve to Huntail. If it was deepseascale, it will evolve...
The Deepseascale in Pokemon Diamond (Which increases Clamperil's Sp. Defense Score and evolves it into a Gorebyss if held during a trade) can be found on wild Chinchou, Lanturn, and Relicanth....
To get the deep tooth scale or tooth go to the abadoned ship and dive after you solve the little puzzle then dive down and get the scanner and go to Captain stern he will ask for the scanner the...