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