The answer, of course, is no--especially when said systems are created Flickr user lego27bricks.

I mean, seriously, is the contraption in the photo above not a thing of beauty?
This LEGO GameBoy is even more striking when shown sitting next to the real thing, which is what you get with the following photo:

To see more photos of the stunning product of lego27bricks's blood, sweat and tears (OK, so I don't know that he cried while making it), check out his Flickr photostream.
(Note: you'll have to scroll down a bit to find them. Believe me, though, they're worth the effort.)