Ghoularry is a Shy Guy that is one of the four friends of McBoo. He is a Shy Guy with cyan shoes that is under a white sheet that has holes cut in the shape of a Shy Guy's mask cutouts.
Ghoularry appears as McBoo's friend that seems to have a shy personality. In McBoo's Mansion, he wears a purple party hat with red strips and light blue ribbons coming out of the top. This kind of party hat is also worn at the surprise deathday party for King Boo by McBoo, O'Lantern, and Akro Bat. He is the only one the doesn't take off his party hat, meaning that he could be forgetful. His party hat however, falls off in the middle of the game, which makes Ghoularry blush. The party hat and sheet is an obvious reference of Doopliss from Paper Mario: The Thousand-Year Door. Ghoularry is also the only ghost out of the four that doesn't talk by only makes Shy Guy noises.
He is the only ghost of the Four Amighosts that never talks. Though not much of Ghoularry's personality has been revealed, he is confirmed to be very shy, being that he wears a sheet over his head all the time. Though Ghoularry is most likely a Shy Guy, his body is never seen.
He is the shy one of the Four Amighosts yet, Ghoularry is not a chicken. He is a fighter that would sacrifice himself for his friends, because under that plain white sheet is a brave warrior. The thing is, it's hard to communicate with his friends if all he does is make Shy Guy noises.