Yux

Yux appeared in 2004 video game called Paper Mario: The Thousand-Year Door. Yuxes are X-shaped creatures created by the X-Naut army, appearing in Paper Mario: The Thousand-Year Door. They are first encountered in the Great Tree where they are used as security by the X-Nauts. A smaller number appear later in the X-Naut Fortress on the Moon.

In battle, Yuxes produce a Mini-Yux from within themselves at the end of every turn; the Mini-Yux sustains a barrier around the Yux that renders it invincible. The Yuxes attack with ring beam that pierces defense; even Damage Dodge badges have no effect on the damage they deal. This means that a Yux's attack will always deal at least one damage unless the target performs a successful Superguard.