From the Super Mario Wiki
Retrieved from "https://www.mariowiki.com/index.php?title=Buckbomb&oldid=2272319"
Buckbombs are robotic bomb chickens that appear in the Factory area of Donkey Kong Country Returns and Donkey Kong Country Returns 3D. Buckbombs behave the same way as Buckbots, but when stomped on, they prepare to self-destruct. The Kongs can pick up a Buckbomb before it explodes and throw them to take out other enemies in a similar manner to Bob-ombs, such as the durable red Pyrobots. Rolling into them defeats them immediately.
Buckbots and Buckbombs were most likely created by Colonel Pluck, considering that the Buckbots appear during the boss fight.