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 ...

To quote the project readme: I really want to like the Game Boy Advance. Growing up with a GBA SP, I was spoiled by its clicky buttons, rechargeable battery, and illuminated screen. When I finally ...

For starters, it’s got more face and trigger buttons than the GBA SP did, opening up play to a wider variety of games. SD card support lets you put thousands of games on the handheld at once ...

And there's also the Expansion Pack tier that features Nintendo 64, Sega Genesis / Mega Drive, and Game Boy Advance games ... additions as well as the bonus SP iterations of certain games.