Hmmm How can I change the top of my heavenly Chao's head, it's a Halo, will it stay the same, and yellow, will it stay the same colour too.
The top of the head is also pointy :S can I change the top of it's head???

you can change the halo by giving it different chaos drives/animals. but your chao is a hero/run so you can't change the point.

The point can be changed a little if it undergoes second evolution. Try rising the level of a specific stat to change its looks and colors. For more detailed information, go here: http://chao.hippotank.com/sa2/evolution2.php