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