You know what they say -- if you can't buy it, mod it. Michael "Bibin" Moffitt's backlighting job on this Game Boy Pocket is a case in point. Unwilling to shell out the dough for a Game Boy Light on eBay (but more than willing to destroy two old LCDs in pursuit of his mad dream), this guy removed the reflective layer and adhesive behind the handheld's display ("almost as hard as reasoning with a rabid PlayStation 3 fan," he writes) and built a backlight out of an LED, some perspex, and a diffusive layer. That's it -- now our man is playing Donkey Kong, in the dark, in all its monochromatic glory, and with no noticeable change in battery life. Hit the read link for plenty of naked GBP pics.
Update: The pictured device belongs to Palmer Luckey, who worked alongside Moffitt to mod a pair of devices.