No and none. While porygon and porygon2 can exist outside their computer mainframes (contrary to popular belief), they’re actually extremely docile and compliant to human commands. They never stray far from the humans who have created or bred them—unless they’re given to another human, of course.
Porygon-Z, on the other hand, is a bit more wild. Luckily, there have been few documented cases of porygon-z, period, and all of those cases seem to be quite content to stick with their human partners (much to their dismay).
The Pokédex According to Bill 