Gear Grind is his main attack move. Its also his signature move, Klang is the only known pokémon species that can learn it. It hit 2 times, each with 50 power. More the same type attack bonus (STAB), he can deal a lot of damage. Because it can hit two (2)
times, you can break trought focus sash and sturdy. He can also hit super-effective on common pokémon of the OU tier, like Tapu Koko.
Just kidding, I dont dab.