How can I find my code number to give it to my friend to battle online in the wii and in the nintendo ds. By the way I will battle at request I have 493 pokemon in my wii and ds

I don't know where you find it in your wii system, but I do know where you find it in your ds system. You can find your friend code on your home screen. Select the square-shaped smiley face and go to you mii character. Your friend code should be on the bottom right corner of the top screen.