With a possibility of evolving into a Gengar and with its great Ghost-Poison typing, Gastly is a good addition to any Pokemon team. The large open world of Paldea will have many places where Gastly can spawn, but there is one area where they are plentiful.
Gastly can be found around South Province (Area One).
Check the guide for more information on where to find Eevee in Pokemon Scarlet and Violet!
Gastly Location – Pokemon Scarlet & Violet
Gastly is a common staple in the Pokemon series. He can be found in South Province (Area Two). Being a Ghost type Pokemon, Gastly will only appear during night time.
If you would like to catch one, it is recommended to use a Dusk Ball for a higher catch rate during the night.
For a more precise location, look at the map above.