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.
at least I know that it evolves clamperl, if someone knows another just inprove answer
Clampearl has two possible evolutions - Huntail and Gorebyss (this is also called a branch evolution). To evolve a Clampearl into either one of the two possibilities, a special item must be equiped to it and the Clampearl traded. To evolve it into a Huntail, a Deepsea Tooth is needed. To evolve it into a Gorebyss, a Deepsea Scale is needed. One of the two items can be obtained in Pokemon Ruby or Sapphire as a reward from Captain Stern in Slateport City.
you dont
you need to trade it with it holding a deepsea tooth and then trade back. same with deepseascale.
get an action replay and find a cheat for it (i forget what it is called) but there are 2 types, heart scale and master ball. i prefer the heart scale cheat.
deepsea tooth gets you huntail while deepsea scale gets you gorebyss. You can decide which on you think is better now.
Both can be found in White Forest and Join Avenue.
Go to route 221 and fish for a Clamperl. Make it hold Deepsea Scale and trade it. Deepsea Scale can be obtained by catching wild Chinchou. They sometimes hold it.
It requires a deepsea tooth or a deepsea scale.Once the either item is obtained, and attached to clamperl, clamperl must be traded to another pokemon cartridge. The deepsea tooth helps it become huntail, the deepsea scale makes it evolve into Gorebyss.
4 clamperrl 2 evolve u must have a deepsea tooth 2 get huntail or a deepsea scale 2 get gorbyss.
Clampearl does NOT evolve from leveling up. To get huntail you give it a deepsea tooth and trade it. To get gorebyss you trade it with a deepsea scale.
No only in ruby and sapphire and emerald.
at least I know that it evolves clamperl, if someone knows another just inprove answer
you have to go to the abandored ship by dewford town, find the scanner then fly to slateport and give it to the captin (forgot his name) he will trade it for deepsea tooth or deepsea scale. you can only get one of them. if you already got 1 of the the other one is impossible to get without trading or cheating. deepsea tooth evolves clampearl into huntail and the scale evolves clampearl into goryabs (sorry about spelling)
Clamperl evolves in two ways. One way is to trade it while holding a DeepSeaTooth. Another way is to trade it while holding a DeepSea Scale. If you trade it while it is holding a DeepSea Tooth it will evolve into Huntail. If you trade it while it is holding a DeepSea Scale it will evolve into Gorebyss.
First you need to go through the abandoned ship and get a scanner from a scientist in there Note: need dive, then give the scanner to captain stern and he will allow you to choose either a deepsea scale or deepsea tooth obviously you want the tooth. Finally have a clamperl hold the deepsea tooth then trade it to a friend then take it back and it will be huntail, if you chose the scale you will get gorebyss instead of huntail.
in fact it does not evolve with leveling up. It evolves with a deepsea tooth or deepsea scale held via trade. Glad if I could help.