[Ric]

I have played the dramcast version of the chao's and I would imagine that the way you bring them up is the same, I have had many different colours, blue, green, yellow, orange, brown, black, white, red... it all depends on the type or 'colour'* of animals and chaos drives you give them and weather you care for them with good (making a good chao) bad (making a bad chao) or both (making a neutral chao) it takes a looooong time to get all different combinations and I strongly advise looking on www.gamefaqs.com for more information.

* the 'colour' is determined by the colour of the box around the animal when you collect it not necessecerely the actuall colour of the animal itself. Try only giving one colour of items to your chao. Different coloured drives affect a different traits eg swim, run etc.