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