Sir Grodus

Grodus is the supreme leader of the extraterrestrial organization called the secret society of the X-Nauts in Paper Mario: The Thousand-Year Door. The organization consists of X-Nauts, a band of thugs determined to capture the Crystal Stars before Mario, so they can dominate the world with the treasure behind the Thousand Year Door. He kidnaps Princess Peach to use her as an offering to the treasure behind the Thousand-Year Door, the 1,000-year-old demon, the Shadow Queen.

Throughout the game, he remains in hiding at his fortress on the Moon, sending out Lord Crump or the Shadow Sirens to perform his will. Grodus pulls the plug on TEC-XX at the end of Chapter 6. After Mario and his pals confront Grodus in the Palace of Shadow, Grodus reveals he tricked Mario and company into collecting the Crystal Stars to open the Thousand-Year Door. Although Mario and his pals defeat him in battle, Grodus escapes after Mario and company are distracted by Bowser and Kammy Koopa. Grodus summoned the Shadow Queen, presenting Peach as a vessel for the Queen's spirit. Grodus attempts to control the Shadow Queen, however the Queen is not one who takes orders. In fact, Grodus was manipulated by the Shadow Sirens to resurrect their Queen. As a result, the Shadow Queen zaps him with lightning, destroying his body. After the Shadow Queen annihilated him, he was still alive, only his cranium was the only active thing in his body. His head currently resides in Poshley Heights.

He can create Mini-Yuxes called Grodus X (explains why he has that mechanical head). He requires 4 Grodus Xs to create a forcefield to protect himself. If a single Grodus X is destroyed, the forcefield breaks. His main form of attack is that scepter he's holding.

Grodus

 * Stats: HP 50, Attack 7, Defense 1
 * Tattle: That's Grodus! He's the head of the X-Nauts who kidnapped Peach. Max HP is 50, Attack is 7 and Defense is 1. But... when he has Grodus Xs surrounding him, his Defense will go up by that number. He may also use electricity, fire, and time-stopping magic. That doesn't sound good! Still, he's a totally weird guy. Why's he so intense and serious all the time? I guess we don't have time to worry about that. Let's beat him and find Peach!
 * Tattle Number: 120
 * Tattle Log: The nasty creature who kidnapped Princess Peach. He's into world domination. Some hobby, huh?

Grodus X

 * Stats: HP 3, Attack 4, Defense 0
 * Tattle: That's a Grodus X. It protects Grodus. Max HP is 3, Attack is 4 and Defense is 0. This guy is no problem on his own, but Grodus's Defense goes up for each of them. When he has four surrounding him, we won't be able to damage him at all. So let's dish out some hurt to them while we pound on Grodus. Got it?
 * Tattle Number: 116
 * Tattle Log: An annoying magical protector of Grodus. When he has 4 of these, he's invincible!