Koozer is a stronger version of Bronto Burt. Koozer is a fatter version of Bronto Burt with a strange expression on is face, along with what appears to be a beak for a mouth. It not only flies faster than Bronto Burt but also takes away two HP if it hits Kirby, otherwise it behaves exactly the same. Koozer appears in the Extra mode in Kirby's Dream Land (replacing Bronto Burt) and in Revenge of the King in Kirby Super Star Ultra.
Koozers are also notorious for appearing and swarms and rushing at Kirby, much like Bronto Burts sometimes do. This is also seen in the opening cutscene for Purple Plants, where Koozers, along with another crow-like enemy, Croucars, appear in a large group and rush him.
Koozer is a strange, mosquito-like, crow-esque creature. Its skin seems to be covered with dark purple feathers (though these were originally black in color). It has rosy cheeks and a strange look on its face (as Koozer is cross-eyed). Koozer has elements of both mosquitoes and crows, as it has paper-thin translucent insect wings and a pale yellow beak.