Approximately 2 hours
A chao evolves in 2 ways. To get a dark chao it will evolve when you have made it have a dark wing. To get a hero chao then it will evolve when you have made two balls on his head connect.
it takes a while. Just check your chao each day and you should be able to see it evolve.
I don't know exactly but, a loooooooooooooooooooooooooooooooooooooooooooooooooog time.(be patient) =)Grandmaster Q&A
all you have to do is get a new born chao any color and pet him with shadow alot make his stamina level 8or7 he will evolve and you have a dark chao
just wait until the chao sits down then you will see an invisible cocoon
You must take care of your chao for a long time eventually when it reaches one years old it will become an Adult. Also if you buy hero fruit/dark fruit and feed lots of them to your chao when they grow up they will become an angel/devil chao.
Where the chao is raised doesn't matter; it will take the alignment of whoever raises it the most. A good indicator is the wings; if they are dark, your chao is getting more evil, and vice-versa.
3 to 4 hours
I take it you mean a Chaos chao. Reincarnate it twice,then on the 3º life give it one of each all 21 animal types (no drives).Wait for evolution.The type of Chaos chao you get depends of it's alignment.
Wait patiently in the chao garden for a very long time make sure you take care of your chao of course after a long time take it to the doctor to check its age it should of gone up if not wait more.
it takes a little while for chao to get older but you have to care for it and after a while(depending on which character you use hero or evil)then the chao will go to the stage of chao death.
Chao don't need to be a specific level in any area to evolve you just need to take care of it until it turns 1 yrs old thats when it will evolve it will turn 1 when a certain amount of time has been spent in the chao garden generally about 5 to 10 hours might do it.