Well, sieeng as it's Black and White it would only fit for it to be Gray. In Generation I it was Red, Blue, Green, and Yellow. It fit sieeng as they were colors. In Generation II it was Gold, Silver, and Crystal. It fit because they were gems. In Generation III it was Sapphire, Ruby, and Emerald. They were also gems. The same goes for Gen. IV and Diamond/Pearl/Platinum. And Generation V it was Black, White, and maybe Gray. IT fits sieeng as they're colors. Notice a trend? Each generation is either a gem or a color. Well enough of my ranting. Later!