Because SGB palettes weren't intended to be used on the whole screen at once (or, at least, you couldn't assume that they were intended to be used that way). Wh

Because SGB palettes weren't intended to be used on the whole screen at once (or, at least, you couldn't assume that they were intended to be used that way). What looks great on one region might look terrible on the entire screen. So they decided to simply set it up so that if you wanted to make a palette available on the whole screen, you could do so by making a CGB version of it. Interesting article, though. It would be interesting to see more games designed this way, though I doubt that'll ever happen. Pity, that.