Robot Zombie Unicorn can be very difficult to locate. Mostly they reside in the drainage pipes under elderly women's homes, though some have been found in the basements of various pubs and bars in New York City, most likely being held for sale on the black market. When attempting to locate a Robot Zombie Unicorn, try using a radioactive fluid detector, or RFD to do so. They will appear on the radar as 10 foot tall horse shaped objects. They appear on the RDF due to their radioactive discharge. And what ever you do, don't sneak up on them unless you have a suicide wish.