... because it was never localized to English in official sources.
Croucars is a dark reddish-purple crow that replaces Twizzy in the Revenge of the King sub-game in Kirby Super Star Ultra, where Tookey is replaced by the pelican foe Cawcun. Croucars acts very similarly to Twizzy. It is just a bit faster, stronger, and has a bit more stamina. Croucars have a tendency to fly directly at Kirby when approached. Some Croucars are also seen in the opening cutscene for Purple Plants, where they, along with some Koozers, fly at Kirby after he chases a solitary butterfly, pushing him away as they do so.