get eggman and throw the chao
The Chao has to be neutral and have speed as it's main stat.
You can only make hero and dark chao in SAB2. Also Sonic chao are neutral so if you give your chao a lot of run animals you will get a Sonic chao.
No you can not make a chao age faster
There is no "egg chao" in SAB2, but you can put eggs on an already born chaos. You chao has to be somewhat smart, and you have to be very persistent, but if you keep handing an eggshell or unhatched egg (murder!) to a chao, it will eventually figure out it can put it on it's head, which it will do itself. This effect is permanent and the egg cannot be switched out afterwards, so make sure the egg/eggshell given is a cool one!
Leave yourself in the chao garden and go do something else
Well, a fast way would be to get Action Replay, For cheat codes. But, If you don't want to cheat.. I suggest you follow traditional steps. 1. Care for the chao, but use a balance of good and evil characters. 2. Wait a while, to Reincarnate it twice. 3. Give it One of each kind of animal. No Chaos Drives! 4. You will soon have a Chaos Light Chao.
Either get a two tone grey chao and make him a shadow chao or a two tone blue or sky blue chao and make either of them a shadow chao or a two tone black chao.
Press A on the egg to make it hatch faster!
you can't really make a gold chao unless it's ancestors were gold chao.
You can't make a Chaos Chao look like Sonic, but you can make a regular Chao look like him.
Yes
It just the way the game goes.