Tropes
- Bizarre Alien Reproduction: Goblins in the Land of Ooo are apparently spawned in a "birthing pit".Half-Formed Goblin: I'm being born!
- Blue-and-Orange Morality: Because of their bizarre cultural norms, the goblins see Finn brushing his teeth by himself and trying to return stolen property as proof that he's just as evil as Xergiok.
- The Caligula: Xergiok was this as a ruler.
- Equippable Ally: Finn fights off Xergiok and his Earclops army while wearing Jake like a suit of armor.
- Exit Villain, Stage Left: Xergiok teleports away when first defeated, and unsuccessfully tries to the second time.
- Extreme Doormat: The goblins are completely obedient to the old king's ways out of paranoia.
- For the Evulz: Xergiok even spanked a goblin doing a marriage proposal for no reason. He does sincerely congratulate the bride, though.
- Fusion Dance: Finn climbs into Jake's mouth and wears him like a costume, to disguise himself for the second fight with Xergiok.
- Gilded Cage: Finn is enticed by the cushy and beautiful palace of the Goblin King, but he quickly grows frustrated on learning that the Goblin's strict rules mean he's not allowed to do anything for himself, from brushing his teeth to fighting evil.
- Hoist by His Own Petard: Xergiok is defeated in his rematch with Finn by inadvertently teleporting into the path of one of his deflected fireballs.
- Jerkass: Xergiok, he was a complete jerk to the goblins.
- Obstructive Bureaucrat: Gummy prevents Finn from doing anything at all as goblin king, because the Royal Rules effectively strip the king of all power.
- Noodle Incident: At one point a wizard cursed Jake to have his insides smell like vanilla.
- Properly Paranoid: The goblins are very frightened to defy Finn due to their abused past with Xergiok.
- A Villain Named "Z__rg": Finn must defend the goblins from their evil king Xergiok (the X in his name is pronounced as a Z sound)
- Weaksauce Weakness: Earclopses can be stunned by any kind of loud noise.
