Where to Find and Catch Sableye
From Pokemon Go Wiki
Sableye are found and captured in Nest and Habitat locations.
Nests
Sableye Nests are locations that consistently spawn Sableye.
Habitats
Sableye Habitats are spawn locations where Sableye is likely to be encountered, but not guaranteed the way a Nest is.
Additional Tips and Information
Best Nests
If you know a really good nest or any of the nests above is really good, list them here: