According to sacred texts:
"THE Kobold is exactly the same being as the Danish Nis, and Scottish Brownie, and English Hobgoblin.
He performs the very same services for the family to whom he attaches himself."Exactly the same.
Wikipedia says that "Although usually invisible, a kobold can materialise in the form of an animal, fire, a human being, and a mundane object."
Sounds like a pooka to me.
Actually what does it matter if they look like Pathfinder's kobolds or this?
I prefer my lizard men to look like this:
It's a little big.
Plus, Patrick Reichel was good enough to grant permission. It's a bit ironic, though, you can go up to a Copyright holder and ask and they say yea or nay. But if you go up to a CC user who doesn't under stand what CC means, it can get confusing.