Rusty is a narrow guage Diesel.
Season 1 - Luke and the Special Party (cameo), Rusty and Victor, Sleepy Merrick
Season 2 - Yellow Rheneas, King of the Mountains, Duncan and Smudger (cameo), and Luke and the Cuban Repairs
Season 3 - Duncan's Donuts, Sir Handel, Rusty and the Runaway Boulder, Rheneas and the Bridge, and Duke Returns
Season 4 - Peter Sam's Delivery (cameo), Stepney's Spooky Night, Special Twins, Colin and the Party (does not speak)
Season 5 - Skarloey, Rusty and the Snow, Blondin Bridge, Duncan and the Ghost Engine, Toby and Rheneas (cameo), Hiding in the Hills (does not speak) and Mine Rescue