Scruff

Scruff is a boxy tank engine, who works at the Waste Dump with Whiff.

Trivia

 * Scruff did not have a rear coupling hook in the fourteenth season, yet he was seen pulling trucks. As of the seventeenth season, he now has a rear coupling hook.
 * Scruff's whistle is Percy's at a higher pitch.
 * For some unknown reason, Scruff's nameplates has always been blank in the television series but not on his merchandise.
 * In the twentieth season, Scruff gained lamps and brakepipes on his front and rear.
 * His side tanks are considerably taller than his basis to accommodate his face.
 * Scruff travels far faster in the television series than his basis is capable of.