Gilnark the Terrible is a minor character that makes it's debut in "Second Christmas", it terrorizes cities on Great Kergoff which is what Starfire celebrates, when the Titans didn't want to wait until next Christmas, they decided to make up their own holiday.
The Monster is a holiday mascot of the Great Kergoff, (although he is mentioned, and does not fought the Titans), he also made a cameo in "Some of Their Parts", where he was dead with some other monsters that the Titans' emoticlones battled.
It is a purple creature with arms in the front, and two on it's back, and has spikes on it's tail and back.
- Second Christmas (flashback; mentioned)
- Some of Their Parts (cameo)
- It is one of the second mentioned monsters that the Titans did not battle, the first being the Fruit Juice and Barbecue Sauce Monster.