Klobber

Klobbers are members of the Kremling Krew that wear barrels.

Donkey Kong Country 2: Diddy's Kong Quest
Klobbers first appear in Donkey Kong Country 2: Diddy's Kong Quest as common enemies. Klobbers will hide in their barrels and wait for Diddy or Dixie, when the duo approach, Klobbers will attempt to charge into the Kongs with intent of shoving them into other enemies, into an abyss or something equally as bad. The Kongs can knock a Klobber unconscious by bonking it on the head (either by jumping on it or throwing something at it). After a Klobber is knocked out the Kongs can use the barrel as a weapon. Sometimes Klobbers will run off the edge of an abyss, just by chasing a Kong.

A yellow version of Klobber also exists. These yellow Klobbers use the same strategy as the green variety (hiding in a barrel and charging recklessly when the Kongs approach). The major difference between the green and yellow Klobbers is that the yellow variety can make the Kongs drop their collected Banana Bunches. Also, gray Klobbers with red eyes exist as well. These Klobbers are the most dangerous. As whenever they hit the Kongs, they cause them to drop a Balloon. The majority of gray Klobbers are found in the Lost World. Red Klobbers (known as Kabooms) also make an appearance. However, they hide in TNT Barrels instead and explode whenever they make contact into any Kong.

Donkey Kong Land 2
The green Klobber variety appears in Donkey Kong Country 2's pseudo-sequel Donkey Kong Land 2. Here, they played the same role, and had the same attack patterns.

Donkey Kong Country 3: Dixie Kong's Double Trouble!/Land III
Enemies similar to Klobbers, called Knockas appear in Donkey Kong Country 3: Dixie Kong's Double Trouble! and Donkey Kong Land III.

Donkey Kong 64
Green Klobbers and Kabooms also appear in Donkey Kong 64. Here they were uncommon enemies, found only in Angry Aztec, Gloomy Galleon, and certain areas in Crystal Caves. This time, Klobbers actually do hurt the Kongs when they run into them. They were also immune to almost all of the Kongs' attacks. However, a shock wave attack or an orange grenade can take them out.

Donkey Konga 2
Klobbers also appear in Donkey Konga 2. Klobbers most recently appeared in DK: Jungle Climber, where they are uncommon enemies since two only appear in Spooky Woods, and can climb on Pegs and try to bounce into the Kongs.

Trivia

 * According to the game's credits, Klobbers belong to the "Kremling Kuthroats" enemy class.
 * Whenever a Klobber runs it makes a sound similar to tires screeching. In Donkey Kong 64 a Klobber, when chasing a Kong will sometimes "C'mon!" in a very Daffy Duck-esque voice.
 * In the Donkey Kong Country 2 guide, Klingers were said to be the only Kremlings that can climb. However, in DK: Jungle Climber, Klobbers can climb on chains.