It is a small robotic enemy whose whole body consists of a head with small metal arms attached directly to the side, a face like a Primid's, and a propeller on top which it uses to fly around. It attacks by dropping red-hot metal bricks directly onto the player (and wears thick gloves to protect itself from the heat). Sometimes, however, it will drop food and Maxim Tomatoes to heal the player, and also occasionally Super Scopes and Ray Guns.
Buckot's name is a portmanteau of the words bucket and hot, given that it uses a bucket to drop white-hot chunks of metal on the player. It might also be a combination of the words bucket and bot, since it's a robotic enemy.