3.5 gleanings from Fiend Folio

[the Jester]

Thanks, guys!

The only creatures that can't have an Int score are Vermin and Ooze.

And actually, there are exceptions there too- the worm that walks is an ooze with an intelligence score, and the puppetmaster is an intelligent vermin (though it should prolly be a magical beast, really).

But yeah...