Karl Cassidy is Kat's baby brother.

Appearence Edit

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 Watching Karl, Peter Cassidy left Kenny and Kat in charge of Karl. As one would expect, Karl escaped from The House, and our two heroes wound up chasing him all over town. 


  • In classic little kid fashion, he constantly addresses Kenny as "doggy".