Maybe so - but I played all of my GB games on a GBC. The added colour is nice, especially since there are several palettes to choose from. It's just another feature that really should be available. It really cant be difficult to emulate - it was on the GBC...
I would think forcing the GB games to switch between emulators would be a bad idea.
And you can change the color scheme? How? I was always stuck in a bland color scheme when I played Pokemon red on my GBC.
