Artwork of a Yux
|First Game||Paper Mario: The Thousand-Year Door (2004)|
The regular Yux can be found in The Great Tree during the X-Naut takeover during Chapter 2. They are often found near regular X-Nauts and can attack from a distance with their beams resulting in a First Strike should it hit Mario.
In French, Yux are referred to as Cruxiverts. (Green Cross)