XANA-Odd is the Polymorphic Clone of Odd seen in the episode Revelation. The clone acted very much like how Odd would act if he was in a bad mood. However, unlike the real Odd, his pupils are a bit smaller, like they were in the first season. It took on Ulrich's form after Ulrich saw through XANA-Odd's disguise.
The XANA-Odd had the ability to shoot a consistent stream of arrows from within his arrow launchers.