Acks are enemies in Donkey Kong Country Returns. They appear in the fifth level of the Ruins, Itty Bitty Biters. They are larger, red-colored versions of Toothberries. Acks are more aggressive than Toothberries. They jump higher than Toothberries making them harder to be defeated. Acks, like Toothberries, try to bite the Kongs (Donkey Kong and Diddy Kong). Unlike how a Toothberry takes only a jump to be defeated, Acks take two jumps to be defeated for good.