|Game(s)||Paper Mario: The Thousand Year Door|
X-Naut PhDs are the scientists of Grodus' empire. They are the ones who create the various potions for X-Nauts and Elite X-Nauts that increase their power or health. They also created the Yux species and the Magnus Von Grapple . X-Naut PhDs themselves are a tough opponent since the potions they throw can set Mario on fire, increase their power, or heal themselves.
|The X-Naut Army|
|Yuxes:||Yux | Mini-Yux | Z-Yux | X-Yux ||
|Other:||Characters: Beldam | Marilyn | Vivian | Doopliss|