How can you find a deep sae scale on Pokemon black 2 version?

In Pokémon Black 2, you can find a Deep Sea Scale by defeating or capturing a wild Clamperl, which has a chance of holding it. Additionally, you can use the Itemfinder or search specific areas where Clamperl appears, like the ocean routes. Remember, the Deep Sea Scale is used to evolve Clamperl into Gorebyss when traded while holding it.