As a result of my post-burglary rebuidling efforts I broke down and finally bought a GBA SP. I popped in Qix and my jaw nearly hit the ground.
Qix on a GBA looks absolutely amazing. Objects all appear in yellows and reds on the bright white background. It's veritably a lush color pallette for what is supposed to be a black and white game. I then put the cart in my son's GBC and saw the same effects, but less pronounced owing to the absence of backlighting.
My first thought was that this was one of the GB games that had a color pallette for use with the Super Game Boy, but this could not be the case because Qix came out in 1990 and the Super Game Boy wasn't released until about 1993, as I recall.
I understand that the Gameboy is not a strictly monochrome device; that it can display different shades of gray or black or whatever. I suppose all that's happening with Qix is that the GBC or SP is translating these shades into primary colors, but the contrast is striking.
So in grand roundabout fashion, I come to ask: What other monochrome GB titles out there (excluding Super Game Boy compatible titles) look really great and colorful when played in an SP?