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In the Thomas movies, he stars as a minor antagonist in Calling All Engines, Misty Island Rescue & Day of the Diesels and stars as the main antagonist in Blue Mountain Mystery.
Diesel is devious, evil, bullying, and dastardly.
Diesel is a black diesel engine. He has a square, gray, face, black eyes, a red buffer beam, and often wears a scowl on his face. Diesel has six, black wheels He speaks in The Lost Puff.
- 1. Diesel! (debut)