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