A Polymorphic Clone is a monster created by XANA that looks and talks like the target person, whom is usually abducted or placed inside a Guardian. They are comprised of a spectre. Polymorphic clones have the same superpowers of a XANA-possessed person, but aren't swayed by the emotions of the host, like spectres. Because of this, they cannot replicate positive human emotions such as compassion and love (at least the emotional kind), therefore making them rather obvious. What could have been the first of these, (though it was a Monomorphic Clone) the XANA-Yumi, appeared in Image Problem, who was easily discovered by our heroes to be fake, and was probably a prototype for future clones. The discovery was made when Aelita deduced the one in the Guardian to be the real Yumi; the fake attempte