Get a whole bunch of green chaos drives (the best way to get them is by getting them on hard mode in Iron gate) buy a black chao and hatch it with shadow. Keep giving it green chaos drives (with shadow of course) until it starts to grow shadow's hair on the back of it's head(most the time it doesn't grow shadow's hair till it likes you and its run is at level 20-30).keep feeding it fruits until it evolves. it should look like a minuature shadow without shoes and gloves.