When you trade a Clamperl with the deep sea scale through the cable link to another gameboy advance, it will evolve into a Gorebyss. Other than that it just doubles Clamperl's Sp. Defense when held.
The deepseaclaw is not an item there is a deepseascale and deepseatooth.
you trade clampearl while its holding a deepseascale
Huntail + deepseascale+ trade=gorebyss
sometimes when you catch a clampearl it holds a deepseascale
In Pokemon emerald, ruby or sapphire: Get a Camperl and a Deepseatooth, equip it to Camperl, and trade it. It will instantly evolve into Huntail. Be careful, if you've already chosen the Deepseascale, you cannot get a Deepseatooth.
Chinchou, Lanturn, and Relicanth all hold deepseascale
Gorebyss and Huntail are the next evolution of Clamperl, somewhere in the game you get the choice between a deepseascale or a deepseatooth... You give it to your Clamperl and then trade your Clamperl as it is holding it. The deepseascale makes it turn into a Gorebyss The deepseatooth makes it turn into a Huntail
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.
I find scanner in Abandoned ship. By the way, to get it you need pokemon that can Surf and Dive. After get scanner, head to Slateport City and go to the Harbor. Give it to him, and he'll give you DeepSeaTooth or DeepSeaScale. You may only choose one. If you trade Clamperl while holding DeepSeaTooth or DeepSeaScale, Clamperl will evolve.
Trade a Clamperl with a Deepseascale.
Trade it holding the DeepSeaTooth or the DeepSeaScale. DeepSeaTooth will give you Huntail, DeepSeaScale will give you Gorebyss.
The Deepseascale evolves a Clampearl into a Gorebyss. If you have a Deepseatooth your Clampearl can evolve into a Huntail YOU NEED TO TRADE YOUR CLAMPEARL FOR IT EVOLVE.