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