How do you make a shadow chaos on sonic DX

Give your chao lots of dark fruit (which can be bought in the Black Market), after it looks dark enough stop and wait for it to evolve. After it evolves do what ever you want to do with it (besides hurt it or take fruit away from it), treat it nice. Then wait for it to recardinate (you'll know when it recardinates because it will go into a pink cocoon). If it goes into a grey cocoon it will die. After it comes out the cocoon it will back in it's egg. Rehatch your chao then before it evolves again give it lots of dark fruit and one of every animal in the game. After it evolves you should have a Dark Chaos Chao (Devil Chao).