There are several ways to get "black" chao, each one different for whatever type of "black" you mean. A monotone black chao can be bought as an egg at the black market. This chao, when older, may breed to produce more black chao. There are also SHINY black chao eggs. The "black" chao from the Dreamcast version (also the chao you see in the challenge races that a sortof grayish color with sleepy eyes) can also be obtained on SA2:B by breeding any two-tone chao with a gray chao. This will produce a two-tone gray chao or "black". (NOTE: This is not a BLACK chao, it's just called black..) Many darker two-tone colored chao will turn blackish with colored highlights when alligned to the Dark side(devil chao). Finally, a normal chao, when alligned to the Dark side will be very dark in color, sometimes almost black.
Buy a white Chao from the black market
There are three types of color chao 1:Neutral Your everyday chao you start with 2:Monotone A single colored chao that will remain like that forever can buy from black market 3:two tone chao a chao of two colors Ex:Red and black the arms are red and the body is black can get by breeding a momotone/two tone chao with a neutral colored Wow that was alot
You would breed a yellow chao and blue chao. Or you could buy a green chao egg from the black market.
monotone chaos are the chao that you buy from the black market
Either get a two tone grey chao and make him a shadow chao or a two tone blue or sky blue chao and make either of them a shadow chao or a two tone black chao.
Go to the Chao garden, then Chao Kindergarten and inside the green closet is the Black Market.
No, two tone chaos are gained when you breed a normal chao, and a monotone chao (monotone chaos are just one colour, you buy them from the black market)
note. with a hero chao draw a halo instead of ball hero chao are white. note.dark chao are black and have a spiked ball. - remember, chao are made up almost entirely out of circles (ends of arms, tail, head, emoticon ball.)
Well, really you just can't take 2 chao and get a whole new pure colored chao if you never had that color before, try to see if you can buy it in the black market
You have to buy one from the Black Market.
ok so this is a very easy process! so ill teach you how to do it in both SADX and SA2B. sonic in sonic adventure DX you need to give the chao bunnys so it looks like sonic but before it evolves go to the store and buy some devil chao fruits and give atleast 7 to the chao make sure the chao eats all of it!!! THATS IMPORTANT! BUT the chao MUST be a pure black chao meaning that you bought a black chao egg from the store! this is also important cuz if its not black it will not be dark supersonic! when he evolves give him a crap load of bunnys, his bottum quils will spike up but the top will stay down like it should! for sonic adventure 2 battle you need to get the black egg (obviously) and put the chao in the devil chao garden! give the chao all green chaos drives or all bunnys! when it evolves it should be a darksuper sonic then again keep giving it the chao drives (green) or the bunnys, his quils will spike up and he will be dark supersonic! hope it helped, it helped me alot! ~RIKKIANDSPARKEY