Question Barrel

Question Barrels, or '''? Barrels', are special types of barrels that appear in the game DK: King of Swing''. These barrels appear like normal barrels do in the game, except they have a large, white question mark on their front sides. Upon breaking them, they reveal new peg boards to climb on or new doors that lead to further secrets or level progression. Many of these barrels appear in the level K. Kruizer III Engine. In the first area of this level, breaking one barrel reveals another Question Barrel. Donkey Kong must break several more scattered throughout the first area, revealing a new set of peg boards.

In-game description
Instruction Booklet
 * "If you smash one of these open with an attack, peg boards will appear, doors will open, and other changes will occur."