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