Living Nearby

Not all pokemon want to live in a civilisation. Some pokemon prefer to live in a more wild manner, while still retaining the protection given from living in said civilisation. Of course, that means they will also lose some privileges like being able to get food and such from a collective stash, which residents of The Sanctuary gets. However, they are happy to live like this.

Or, possibly, some pokemon living here simply want others to stay safe from them.