AckStack

Acks are insect-like enemies that appear in the Wii game, Donkey Kong Country Returns. They, along with Cageberries and Toothcherries, are sub-species of Toothberries. They are yellow enemies with fangs. Acks are found in groups of five. Each one of them are piled on top of each other, trying to harm the Kongs. If Donkey Kong comes into their contact, they will fall, attempting to defeat him. However, if Donkey Kong jumps back, dodging the insects, they will land separate from each other. When single, Acks are vulnerable to jump attacks.