I've only tried this with Link's Awakening(NOT DX). If you hold A or B when you turn it on and hold a D-Pad direction, you can change the color of the opening and the game itself. You can change it after it's turned on by spinning the D-Pad to another direction.
But in all seriousness, why are you bothering making these threads on such old information? I doubt it is really benefiting anyone or anything, other than your post count.