Smudger was a complete show-off on Duke's railway, and caused some much trouble. He was very cocky, rude, arrogant, and always fell off the rails. As punishment, Smudger was turned into a generator behind the shed. Whatever happened to Smudger, remains a mystery. He also appears in a cactus190706 YouTube model movie called Sodor's Long Forgotten Secret as the main antagonist along with Bertram as the primary antagonist.