There was already a video-out mod kit on the market for the GBA SP that would let them play games on the TV, but the team still had to figure out how to make a dock for the 18 year old handheld ...
we’re going to try this out to confirm, but the folks at lik-sang cracked up their nintendo ds and it seems that you can chop off the two nubs on a gameboy sp battery and use them in the ds ...