In The Neverhood
Klogg was the first son of Hoborg and originally looked much like Klaymen. When Hoborg introduced Klogg to the Neverhood the only thing he focused on was Hoborg's crown. Klogg jumped up trying to grab it while screaming, "Crown!" Hoborg explained the crown is the only thing he couldn't have. However, later on Klogg took the crown off Hoborg's head and placed it on his own. He then transformed into a beastly looking version of Klaymen, and discovered Hoborg goes into a deep sleep without his crown. Klogg tied down parts of the Neverhood with a chain and a pin so the castle was blocked off. However, Klaymen pulled the pin. Soon Klaymen, Bil, and Willie were headed to the castle. Klogg shot Bil with the cannon but Klaymen made it just in time. Klogg then tries to convince Klaymen to join him and rule the Neverhood together. In the bad ending, Klaymen accepts, puts on the crown and kills Klogg. In the good ending, he saves Hoborg, Klogg charges at the two but accidentally steps on his remote to the cannon and shoots himself off of the Neverhood.
In SkullMonkeys, Klogg lands on the planet Idznak where he accidentally kills one of the skullmonkeys, who's corpse he uses to disguise himself as Kloggmonkey. He then convinces the skullmonkeys to help him build a machine called Evil Engine Number 9 and help him destroy the Neverhood. However one skullmonkey, Jerry-O, sends a flying machine to retrieve Klaymen. Klogg completes the machine when Klaymen arrives just in time. The two fight, and Klaymen kills Klogg.