Where to Find and Catch Scrafty
From Pokemon Go Wiki
Scrafty are found and captured in Nest and Habitat locations.
Nests
Scrafty Nests are locations that consistently spawn Scrafty.
Habitats
Scrafty Habitats are spawn locations where Scrafty 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: