Nintendo Japan Starts Store-Based GBA Wireless Network
Thanks to Planet GameCube for its article discussing Nintendo Japan's rolling-out of the store-based JoySpot service for the Game Boy Advance wireless adapter. According to the article: "Consisting of wireless base stations - also known as hot spots - at retail locations around the country, JoySpot acts as a miniature server and hub for GBA games supporting the wireless adapter." Although players can use the limited-range wireless adapter with friends separately of the JoySpot locations, "...players can download news from the JoySpot station in Pokémon Fire/Leaf via the virtual JoySpot kiosks.. [and] can also take part in special JoySpot challenge battles among other gamers within the station's range by talking to them in the [virtual] union room."
They have this weird sort of "word selection" dialog where a large number of words are classified broadly under a bunch of categories, e.g. "actions", "places", "emotions", etc. It seems likely that the four-word system mentioned here would use a similar type of feature.