|Residence|| Metelonia (formerly)|
New Ninjago City
Karlof was once an engineer who usually created bombers in Metalonia. However, he was soon invited to the Tournament of Elements. On the boat, Karlof tried to steal Skylor's coat, but was confronted by Kai. However, Clouse broke off their fight, which gave both him and Kai a sense of rivalry.
After entering Chen's Island, Karlof asked Chen what he will win if he wins the tournament. Chen replied he will win riches beyond his wildest dreams and a lifetime supply of noodles. During the tournament, Karlof ran into the jungle, but was followed by Kai. There they fought for the last Jade Blade. Karlof won and entered Chen's palace with the blade. However, Kai then snuck behind him, unscrewed his metal fist, snatched the Jade Blade, and put it into its shrine, declaring Karlof the loser. He was then thrown down a trap door.
Karlof was then taken to a secret underground ceremony where Chen drained out his metal power. He then took Karlof to work in his noodle factory.
- In the TV series, Karlof is voiced by Scott McNeil. In LEGO Dimensions, he is voiced by Nolan North.
- He is the descendant of the Elemental Master of Metal.
- He has a very poor vocabulary and speaks in the third person. This is most likely because he lives in Metalonia, which has it's own language, and has trouble speaking the Ninjago language.
- Despite his limited intelligence, Karlof seems to have a respectable sense of honour, as he willingly submits as the loser.
- He appears in The Tournament of Elements quest.