Soot Sack is an item in the “Gameplay” category (Key Items).
In-game descriptions
| Ruby / Sapphire · Emerald | A sack used to gather and hold volcanic ash. |
|---|---|
| FireRed / LeafGreen | A sack used to collect volcanic ash automatically during walks over deep ash. |
| Sun / Moon · Ultra Sun / Ultra Moon · Let’s Go, Pikachu! / Let’s Go, Eevee! · Sword / Shield | A sack used to gather and hold volcanic ash. |
Where to find it
Not placed on the atlas maps (so far: Red/Blue and Generation 3).
Sources : PokeAPI (items, item_flavor_text, machines) · atlas · pokeemerald species_info.h