Dragon Pipe

Dragon Slots (ドラゴンスロート ) are two-headed, gray, serpentine dragons that appear in Donkey Kong Jungle Beat. Dragon Slots first appear in the Apple Kingdom's level Ice Warren. By using the Sound Wave Attack near one, the dragon's mouth opens and it starts to inhale, and if Donkey Kong is close enough to the mouth, he is sucked it, transported through the dragon's neck, and emerges out the other mouth. Using, this, Donkey Kong can move to distant locations.

They later appear in various other levels, such as the Lychee Kingdom's Lava Cavern and the Star Fruit Kingdom's Asteroid Belt.

Trivia

 * A Dragon Slot appears as an unused model under the filename NeckDragon in Super Mario Galaxy.