Sir Grodus

He is the supreme leader of the extraterrestrial organization called the X-Naut Legion. He kidnaps Princess Peach and he wishes to capture all of the Crystal Stars before Mario does to unleash the spirit of the 1,000-year-old demon known as the Shadow Queen. After the Shadow Queen annihilated him, he was still alive, only his cranium was the only active thing in his body. His base is located on The Moon.

He can create Mini-Yuxes called Grodus Xs. He requires 4 Grodus X's to create a barrier to protect himself. If a single Grodus X is destroyed, the forcefield breaks.

Paper Mario 2 Stats

Grodus: HP 50, Attack 7, Defense 1

Tattle: That's Grodus! He's the head of the X-Nauts who kidnapped Peach. 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!

Grodus X: HP 3, Attack 4, Defense 0