The three Trucker Ghosts are Trucker Berg, Dog Face, and Huge Marge. Trucker Berg is the red ghost, Dog Face is the blue ghost, and Huge Marge is the violet ghost and only female. They made their first appearance in the episode "Trucker Hall of Fame" and are dead truckers buried in Memorial Hill. They overheard the message one of the Guards made to stop Muscle Man so they awakened from their memorials and tried to take the Urn which holds Muscle Dad's hat ashes.
- Huge Marge is a reference to Large Marge, a character from the film Pee Wee's Big Adventure who was also the ghost of an old lady trucker. They are the only dead truckers to turn into ghosts.