Dragonfly

The Dragonfly is Wario's unlockable kart in Mario Kart DS that is a red tractor that is taller than most karts. It has average acceleration, handling, and drift, along with high speed, weight, and items.

Trivia

 * The fact that the Dragonfly is a tractor happens to be the most recent in a long line of obscure facts that seem to establish that Wario is a farmer. (In Wario Land II, Wario kept Chickens such as Hen, and the Fire Attack cutscene from Game & Watch Gallery 4 shows him farming.)