wait, i noticed that as their stats increase, they grow new "parts" like horns, but i was thinking, it should be like this:
1.you color them when they're eggs, AND THEY WILL STAY AS THAT COLOR
2.they all look like a neutral chao, other than the color, that is, if you colored them(default colour is blue)
3.depending on their stats, they can become any of the evolved forms, depending in stats
BUT, how can you make them hero/dark?
and, how can you set their stats so they can be either a pure type: aka, they're a flying type, not a speed/flying, or mixed ,aka, a fly/speed?