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. Despite this, he talks twice in the McToons.