The Green Ghosts are, as their name imply, green-colored ghosts that appear on the Graveyard Nightmare. They can be seen on the top of the big purple tree. Although they are harmless to Ned, he must attack them with the yoyo in order to climb the tree to face the Ghoul. They can be seen doing various acts, mostly trying to scare each other, sawing at the tree (to no avail), or happily playing accordion.