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"Cables for linking multiple systems were available, as well as a cable to connect the NGPC and the Sega Dreamcast. Games that featured this option include King of Fighters R-2 (links with King of Fighters '99 Dream Match and King of Fighters Evolution), SNK vs Capcom - Match of the Millennium (links with Capcom vs SNK 2), SNK vs Capcom - Card Fighters' Clash (links with King of Fighters Evolution), SNK vs Capcom - Card Fighters' Clash Expand Edition (links with Capcom vs SNK 2) and Cool Cool Jam (links with Cool Cool Toon). There was a wireless connector released in Japan that allowed several players in proximity to play together, with some cartridge moulding reshaped to hold it. An MP3 audio player add-on was developed but was not released due to SNK's closure."
por lo que se ve solo fueron unos poquitos juegos los que se podia aprovechar esa conexion con la Dreamcast. No sabia que lanzaron un conector inalambrico para jugar entre varias consolas. Y tambien desarrollaron un add-on para escuchar musica MP3 pero nunca fue lanzado.
saludos