What is the name of the character who is a ghost pirate in the show?

The character who is a ghost pirate in the show is the Flying Dutchman.

In SpongeBob SquarePants, the Flying Dutchman is an irritable, mischievous pirate ghost who glows green and haunts the seas around Bikini Bottom. He is voiced by Brian Doyle-Murray in the television series and is loosely based on the legendary ghost ship of the same name.

The character appears prominently in “The Flying Dutchman,” a season-three episode in which SpongeBob, Patrick, and Squidward are trapped aboard his ship. The series gives him a supernatural backstory: his unburied corpse was used as a window display, leaving him to haunt the seven seas.

A common mix-up is Davy Jones, whose name is mentioned in the show as the owner of the famously smelly socks in Davy Jones’ Locker. Davy Jones is not the ghost pirate character being described; that character is the Flying Dutchman.