Krackus is the former chief scientist of The Cluster. He is protrayed as "mad" and often creates inventions that usually end humiliatingly for Vexus's team. However, one of his inventions did work, and this was his disassembler, as seen in the episode 'Around The World in Eighty Pieces.' As a running gag, every mechanical object around him, be it his own or not, malfunctions and crumble to pieces, and he also pronounces Jenny's name wrong.

Krackus is voiced by Jim Ward.