Nintendo has been diving for oysters, it seems, because here are two new pearl-colored systems.
Available September 5 in Japan, there will be two new colors available for the few people that haven't yet bought a Game Boy Advance SP system.

That's Pearl Blue on the left, and Pearl Pink on the right. These two new shades add to Japan's Cobalt, Platinum and Jet tones already available, and will go for the standard GBA SP price of ¥12,500.
There's no word on whether or not these new colors will hit other regions of the world, but if they do, we'll let you know about it here.