Hey, B/W, to get a gold chocobo, you need to have a black one first. Then you can breed the ultimate choc. To get a black one, you need a moutain (Green) and a river (blue) first by breeding with a carob nut.
None of this will happen though, if the chocobos are not S class racers.
Does that help any?? <img src="/images/graemlins/smile.gif" alt="" />