Duck

Duck is a small 10 year old amphibious train who is one of the few Robot Trains in Train World and Rail World. He is a cowardly jokester with a heart of gold, and has been one of the main characters as well as the leader of Train World in the first season. He was rewritten as a supporting character in season 2, and seems to no longer be a robot train in said season.

Appearance
Duck resembles a wooden boat mounted on a 4-wheel locomotive chassis, with an orange hull and yellow superstructure, and a green roof resembling a hat. He is the shortest of the Robot Trains.

When equipped with his units, Duck's forearms have a propeller turbine on the left and a water nozzle on the right, while his feet gain propeller units that allow him to run on water.

Personality
Duck is usually cowardly with a tendency to throw around wisecracks, but he is also friendly and trusting, though he rarely put faith into Duke. Like all Robot Trains, Duck holds great respect to Kay and Jeffrey, and remains one of the most loyal of the group. Duck tends to be lazy in many situations, but he is alway willing to help if work is needed.

Abilities
Although Duck is smaller than most robot trains, as his name and shape implies he can float in the water like a boat, but he still needs to recharge on the rails. Without his units he doesn't have a lot to offer, but with them he can spray fluids, and with an upgrade, he can shoot a beam of water so pressurized and focused it can cut through metal. His units also allow him to quickly travel on water in his robot form. In the second season, Duck retains his ability to float on water though his ability to transform into a robot was never seen or mentioned.