nothing
To evolve it, you have to give it a Deep Sea Tooth (Huntail) or a Deep Sea Scale (Gorebyss) and trade it.
If you give it to a Clampearl and then trade said Clampearl it will evolve into Huntail or if you give Clampearl a Deep sea scale and trade it it will evolve into a Gorebyss
Clamperl can only evolve into Gorebyss if you give it a Deep Sea Scale to hold and then trade it.
you can evolve a Pokemon by raising it up to the level it needs to be,give it stones,and last but not least giving it other items.for example to get a clampearl to evolve you give it a deep sea tooth or deep sea scale and make a trade.
give to hold and then pkmn trade to make clamperl evolve into a gorebyss.
You get an option of either the Deep Sea Tooth or the Deep Sea Scale. Both items evolve Clamperl when it's holding 1 and it's traded to another player. Deep Sea Tooth evolves it into Huntail while Deep Sea Scale evolves it into Gorebyss.
You have to give the Seadra a Dragon Scale then trade it (and back) and it will evolve into a Kingdra.
you must get a horsea and evolve it to seadra then give it the dragon scale and evolve it again then u get a kingdra
give it a dragon scale. Sorry
You do not have to give Feebas a Water Stone to evolve it. To evolve Feebas you need to trade it while it is holding a Prism Scale.
get one of those pearl things and level up your clamperl to a lvl. 20. once you do that, give the clamperl the pearl thing.
give it a dragon scale, and trade it.