After almost 20 years, the SpaceWorld 2000 Game Boy Advance Prototype has been found(more info in the comments Credit:Tom @MarioDS64) : r/Gameboy
Spaceworld 2000 GBA copy - Album on Imgur
Upgrade X12 Plus 7 inch screen portable game console X12plus 16GB with 2000 games for nes/fc/gbc/gba/md/snes bit classic games|Handheld Game Players| - AliExpress
Mike Choi on Twitter: "Finally done. A replica of the Spaceworld 2000 Prototype GBA. With an AGS-101 backlight, of course. :3 http://t.co/Psx1doXhx6" / Twitter
Old Handheld Video Games: Gameboy Advance (2000) - YouTube