You can't change the color unless you use the Action Replay or other cheating devices...because the chance if you didn't cheat of getting a special colored one when catching it is very small. However changing forms is done in the one town where you see the many meteorites in the ground.
You cannot
I'm sorry but its impossible
I'm sorry but that is kind of impossible. You can change your trainer card color though..
No natural diamond will change colour.
No they are just a different color
Unfortunantly, you can't play Pokemon diamond on the computer yet. But you can play all of the Pokemon versions for the gameboy color online.
in pearl,diamond & platnium,know your pokemons and identify the color change,or look at the pokemon's personal file,and see if there's a mini star.
You mean shinys? Well they are all different for each pokemon=(
you cant. i have tried to so i hope that you have Pokemon gold or silver for gameboy color.
It's color is a light blue.
if it's a different color then normal
all