To find the Bull Chocobo the player must have spoken to the "Huntmaster" in Phon Coast and defeated Thalassinon, which will trigger the start of 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!