Smooth Rock: An item to be held by a Pokémon. It extends the duration of the move Sandstorm when used by the holder.

PokémonPokémon %Item %Usage %Usage Δ
Hippowdon 16.6491%16.854%2.80604% +1.2526%
Tyranitar 7.24576%7.124%0.51619% +0.01489%
Gigalith 0.52815%54.607%0.28841% +0.13876%
Sandaconda 0.48228%9.673%0.04665% +0.04665%