From Pixelmon Wiki
A Smooth Rock is a held item that increases the duration of Sandstorm and Sand Stream to eight turns. It can be obtained as a tier 2 special drop. It is also a drop from certain wild Pokémon.
Pokémon drops
Pokémon | Chance | Quantity |
---|---|---|
Omastar | 5% | 1 |
Regirock | 50% | 1 |
Trivia
Before Reforged, this item had the following recipe. It was removed due to many held items being far too easy to make.