I have a chao that's been raised ny shadow, and it evolved with black and red swirls....it has a tail that looks like a bee's abdomen. you gotta see this!!!
it depends on what skill it's best at before it's evolved. try running.............it might look like sonic/shadow's hairdo-spikes. have you done this yet? experiment, but DON'T use animals for powering up!!! they won't evolve!!!!
mine has level 96 running!
I have a weird shiny orange dude................he has this weird hair do on the top of his head.........like a spoiler of a limousine