These are creatures that have been given some "forged" parts.
Creating a Forged Creature
"Forged creature" is an acquired template that can be added to any living, corporeal creature with a Constitution score of 12 or more.
Size and Type
The creature's type changes to Construct and it also gains the living construct subtype. The creature retains all previous subtypes and gains appropriate augmented ones.
Decrease from the base creature as follows: Wis -2, Cha -2.
Composite Plating: The plating used to create a forged creature provides a +2 armor bonus. This plating is not natural armor and does not tack with other effects that give an armor bonus (other than natural armor). The plating occupies the same space on the body as a suit of armor or a robe, and thus a forged creature cannot wear armor or magic robes. Forged creatures can be enchanted just as armor can be.
The character must be present for the entire time it takes to enchant him. Composite plating also provides a forged creature with a 5% arcane spell failure chance, similar to the penalty for wearing light armor. Any class ability that allows a forged creature to ignore the arcane spell failure chance for light armor lets him ignore this penalty as well.
As Base Creature
For the sake of feat requirements forged creatures count as warforged.