Continuity mistake: In the opening credits when the title comes up, there is a picture of Mater beside it with the Ghostlight after him. Mater has his right headlight still intact. But during the film, he loses his remaining right headlight moments before he is scared by the lightning bug, before the Ghostlight ever gets to him. (00:00:10 - 00:04:10)
Continuity mistake: When Wrangler has finished tainting Champ's fuel supply, he proceeds to leave and bumps into a canister shortly after he begins to drive out. The canister falls directly forwards, and lands directly in front of his right headlight. Wrangler then continues to drive forwards, but the canister is now more to his side. (00:20:25)
Continuity mistake: Hargon has a hook for a left hand. After the opening credits (during the dice roll scene) the hook is briefly on his right arm. Then it's left again during the rest of the episode.