Kat's little brother who appears in just a few episodes. He is voiced by Van Morrison.
He shares his eyes and hair with Kat, and also sports a blue shirt and a diaper.
Karl is only a baby, and hasn't a care in the world. He seems happy at all times.
Karl first appeared in "Kid's Menu", when Kenny had a sudden urge to eat him.
- In classic little kid fashion, he constantly addresses Kenny as "doggy".