KL-33N (Japanese: 弟子ロボ Robot disciple) is a robot who can clean fossils. After it watches the hero clean any type of fossil (Dark, Normal, or Jewel Rock) a certain amount of times, it can rank up, cleaning fossils at a higher grade. In Fossil Fighters it can be found in the Fossil Center cleaning room after he is brought in by Dr. Diggins.
- KL-33N is a pun on the word clean (kleen). Its name is formatted in what is called "1337-speak", pronounced "leet-speak".
- It appears to be levitating and has a rotating drill on its head.