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Exdor is the creator of the Ultra-robots who appears in Episode XVIII: Jack and the Ultra-robots and Samurai Jack: The Shadow of Aku.He also made a cameo in a vision Episode XLIII: The Aku Infection


In exchange for his dwellings and it's peoples lives he originally created them to help Aku destroy Jack. However he, like many others before, had been betrayed by Aku when he ordered the destruction of his home town and so he decided to help Jack unmake his abominations.


He is a medium-sized scientist that wears glasses. He also has an odd voice.


As for the fact that he is the one who created and developed the ultimate killing machine the Ultra-robots, some parts of his work laboratory are shown


  • His vocal mannerisms are a reference to the title character in Jerry Lewis's The Nutty Professor.
  • The reason why Aku forces Exdor to create the ultra-bots to destroy instead of his own group of evil scientists indicated that his skills are far superior than the whole scientific groups employed by Aku to create the X-series and Beetle Drone. In the end, Aku was right since Exdor is the only scientist so far that can create robot that nearly kills Jack.