How do you get rouge chaos

A Rouge chao was never released, but here's the closest thing you can get:
Get a white egg ONLY
Give it nothing but green and yellow animals and chaos drives. BUT you have to give it more green than yellow, but you still have to give it a reasonable amount of yellows. Follow?
Make sure with the yellows you give it 100 and the greens MORE THAN 100
If you don't do this step, it will turn out looking like a white Shadow chao :(.
MAKE SURE IT'S DARK!!!!
I hope this helped! ^_^