In "Iggwilv’s Legacy: The Lost Caverns of Tsojcanth" (the place the Cauchimera is from), at p24, there is a creature called a Pech that is described. After some superficial research, it's a minor Earth Elemental resembling a squirrel from 1st and 2nd edition. However, it's not in MM6 and I didn't find where else it has been published. Did I overlook something or should the pech be added to Monster Manual VI?
Edit: same thing with the Tooth Golem, page 89.