They are black balls with red stripes, and have a similar appearance to bowling balls. Their eyes are positioned in the front of the ball. When they move, they bounce up and down, and their bodies will slightly contort and conform to the ground when they land.
Black balls are usually relatively easy to kill, requiring only one shot with any arrow. However, the player should shoot them from a distance, as when they die they explode, wounding any player nearby. Their explosion is similar in size and appearance to the bomb arrow, accessible through cheats n' treats. However, the black ball's explosion will not blow up walls or cause coins to go flying.
The initial blast from a bomb ball exploding
The bomb ball turning into smoke
The smoke disperses and a circle representing the blast zone emerges