It looks like a ghoul, it sounds like a ghoul, it fights like a ghoul, it has the same loot as a ghoul, it even has the same stats and skills as a ghoul…

If I didn’t know any better I’d say that it was a Ghoul, but the name over it’s head says it a Bogle, so that’s what it is.

The Bogle only made a relatively short appearance in the game, from publish 16 and up to the release of Age of Shadows, at which point it just disappeared.