Pathfinder: The New Age of Haven
Leader of the small gang of goblins encountered in the cave of the black dragon whelp.
King Fatmouth knows common well for a goblin and thats likely why the adventurers chose to deal with him diplomaticly instead of slaughtering them all.
The adventurers agreed to his demands about retrieving a lost artifact(a dragon toy) in exchange for information and access to his royal court(the messy cavern they were already in).
King Fatmouth was left alive, along with his retinue of followers, to live out his days as monarch of the filthy goblins.