In FFV they were called Dingleberries, i think^_-
Was Master Pug not in the hidden area of Narshe?o_-(
it's been a while since i played it, though)
And in FFIX, Ipsen's Castle is the only place where they appear
On Tonberry's page on Wikipedia, the question about the Tonberries is that they are a civilized society, taking care of defense, or are they blood-thursty, causing nothing but rampage