Crazy. Pokemon is big as ever. I expect a 5M+ opening worldwide. I would put 10M down, but the install base isn't as crazy as DS. We'll see. But Pokemon fans do come in large numbers, so quite a few more 3DS's can be sold.
Because blue is a peaceful color. The black design almost looks like a cherry tree print; its color has just been reversed. So, instead of a white tree design on a pink background, you have a black tree design on a blue background. And a deep royal blue design at that.
(I need to convince myself to start playing Okami again)