The Wheel master is a large mechanical creature part of whats known as Unbirths. He has the only boss availible to the demo of Terra at the DK₤3713 event in Japan. This boss is located in the Enchanted Kingdom, a world based off of Sleeping Beauty. Though this is considered to be a hard fight, you could escape from the battle during the demo. The boss appears to somewhat resemple a large twisted spinning wheel.