Jelly Ghosts are literally just Boos made entirely out of jelly. They appear in Yoshi's Story, stage 2-3, Jelly Pipe. They will commonly hide in jelly, and then they'll come out when Yoshi is near. They will hurt Yoshi if they touch him. They can be found on ceilings and floors, and can be defeated with Ground Pounds. They appear in only three colors; Blue, Magenta, and Cyan.