So I hear Chao undergo a second evolution. What I want to know is when do you start giving them the animals/drives to do that? Do give it to them BEFORE or WHEN they're 4/5? And no, I DON'T mean rebirth. I mean the second evolution, of which there is no cocoon. In order to make a Shadow Chao, for example, you have to raise it as a Dark/Run type. Then, at some unknown time, you have to give it more Green-Class Animals/Chaos Drives for the stripes to turn red and a few other tweaks and then your Shadow Chao is complete.