Grodus X

From the Super Mario Wiki

Paper Mario: The Thousand-Year Door Enemy
Grodus X

Max HP	3
Attack	4
Defense	0
Location(s)	Palace of Shadow
Log	An annoying magical protector of Grodus. When he has 4 of these, he's invincible!
Items	None
Moves	Zap (4)
Tattle	That's a Grodus X. It protects Grodus. 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?
Bestiary 115 116 117

A Grodus X is a protector of Grodus. Up to four of them can appear, and they will raise Grodus's defense for each one, making the battle extremely difficult. However, if all four of them appear, Grodus will be invincible. Mario should use any Shooting Star, Thunder Rage, or multiply-hitting items he has left to take these out, although players must also conserve items for the surprise battle with Bowser and Kammy Koopa afterwards.