Knocka

Knockas are green lanky Kremlings who hide in green barrels with faces painted on them. Knockas are encountered in both Donkey Kong Country 3: Dixie Kong's Double Trouble! and Donkey Kong Land III.

Donkey Kong Country 3: Dixie Kong's Double Trouble
In Donkey Kong Country 3 Knockas are fairly common enemies, encountered in a large amount of levels. Knockas have an attack pattern similar to an earlier enemy named Klobber; a Knocka will wait hidden in it's barrel, if either Dixie or Kiddy Kong pass by a Klobber will spring forth out of it's barrel and begin trying to ram the Kongs. Since a Klobber cannot directly hurt a Kong they will try and ram them into either another enemy or an abyss.

A Knocka can be defeated by simply jumping on it, this will knock it back into it's barrel. Once back in it's barrel a Knocka can simply be picked up and thrown away. In later levels of Donkey Kong Country 3 two barrel wearing sub-species of Knockas, Klasps and Kuchukas are encountered. Also in the Game Boy Advance remake of Donkey Kong Country 3 an explosive version of Knockas, TNT Knockas are encountered in one level of the game.

Donkey Kong Land III
In Donkey Kong Land III Knockas, along with Klasps and Kuchukas, are still semi-common enemies. The game erroneously lists Knockas as Krushas, however, yet aside from the name, there is no real difference between the Knockas of Donkey Kong Country 3 and Donkey Kong Land III.

Donkey Kong Country 3
Knockas return in this game, apart from the fact that they now have different voices, they are exactly the same as they are in the original Donkey Kong Country 3: Dixie Kong's Double Trouble.

Trivia

 * According to the game's credits, Knockas belong to the "Kremling Kreeps" enemy class.