When there's trouble brewing, Devious Diesel (as referred to by the other engines) is sure to be in the thick of it!
When Diesel came on trial to the North Western Railway, Duck was asked to show him around. Duck was unimpressed by Diesel's claims of being "revolutionary" and left him to his own devices. As a result, Diesel was made into a laughing stock by the trucks for trying to pull some rusty old trucks and failing spectacularly, and Diesel blamed Duck for not helping him. Diesel swore a vendetta, and lied to the trucks about Duck giving the big engines rude nicknames. Duck was sent to Wellsworth pending an inquiry into the matter, but Diesel got too big for his boots and tried telling lies about Henry. He was found out and sent home in disgrace.
- Normal (painted face)