Dusty Bowl is a particular part of the sidequests that allow you to evolve certain Pokémon.
Runerigus can only be acquired by evolving Yamask (Galarian) during these parts of the sidequests.
Sidequest Points
| Battle # | Trainer/Location | Team |
|---|---|---|
| 1919 | ??? Dusty Bowl |
    
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| 1920 | ??? Dusty Bowl |
     
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| 1921 | ??? Dusty Bowl |
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Evolutions
The following Pokémon evolve at Dusty Bowl in sidequests:
| Pre-Evolution | Evolved Form |
 Yamask (Galarian) |
Runerigus |