
Among the diesels that make trouble for Thomas and his steam engine friends, Diesel 10 tops them all! An evil diesel engine with an excavator claw arm, which he has named "Pinchy", Diesel 10 HATES steam engines and will do anything to get them off the rails and in the scrap yard! This evil attitude even makes other diesels fear him!
LOTM: The Angels Return[]
Diesel 10 is a member of the mysterious villain cult that seeks to rob Angewomon and Myotismon of their hearts. He is more determined than ever to rid Sodor of steam engines!
As the Steam Team was greeting and getting acquainted with Team Disney Angel, they had no idea that Diesel 10 was nearby eavesdropping. Back at Vicarstown Dieselworks, Diesel 10 explained the big evil plan to his cohorts - Diesel, Arry, Bert, Splatter and Dodge - and sent Diesel to get Angewomon and Myotismon.
Imprisoned by the diesels, Angewomon and Myotismon were at the mercy of Diesel 10, who told them that they were responsible for the sealing of the "greatest power in the Multi-Universe", but he did not reveal exactly what it was. He then attempted to extract their hearts by using his claw bucket, Pinchy.
Luckily, the Steam Team and the rest of Team Disney Angel arrived just in time, but their fight against the diesels did not prove easy as the diesels could call forth Heartless. It took an even darker turn when Diesel 10 was able to fuse with all the present Heartless and become a huge monster! Despite the fact that Angewomon and Myotismon were free by this time, they didn't seem to stand a chance.
Fortunately, Sailor Libra was able to awaken power that turned her into Super Sailor Libra, and her powers of justice were a big match for the wicked diesel engine!
It also turned out that Francis had found a phone and called Sir Topham Hatt, who was greatly displeased about the diesels' antics! He punished them by having them shipped to solitary confinement until they learned to behave...but is this truly the last we've seen of Diesel 10?