SuccessHK have in stock a load of the OLD Firmware Nintendo DS Consoles, heres what they say:
Compatible with Super Pass Key
Game Boy Advance owners, beware: the DS appears poised to rock the gaming industry to its very core.
The system is backwards compatible with all Game Boy Advance cartridges, ensuring instant access to a library of over 500 games. Planned for future release on the system are titles based on notable franchises such as Mario 64, Metroid Prime, and even the WarioWare series. The pleasures we sampled also included diversions starring the original videogame hero, Pac-Man.
The system is capable of displaying 2D or 3D images on either monitor. Roughly equivalent in power to the Nintendo 64, the machine is capable of conveying crisp, colorful graphics and delivering brain-rattling audio courtesy of a built-in speaker.
Most important is its touch screen interface, which lets users interact with games via a direct finger press or by utilizing a stylus. Microphone support further provides for the inclusion of voice-recognition functions, while Wi-Fi compatibility lets up to 16 connect with a PC or get their deathmatch on from distances of up to 100 feet locally.