The player must have spoken to the "Huntmaster" in Phon Coast and defeated Thalassinon to start the Rare Game quest. The Bull Chocobo then has a 40% chance of appearing in the South Tank Approach. With the exit and enter approach, it will spawn eventually.
[view·edit·purge]The name "chocobo" derives from a Japanese brand of chocolate malt ball by Morinaga, ChocoBall(チョコボール, Chokobōru?). The mascot for this product is Kyoro-chan (キョロちゃん?), a bird who says "kweh."
食う / くう / kuu is a rough way to say "eat", whose volitional casual form is 食え / くえ / kue ("let's scoff 'em down!"), leading to Kweh!