Web pages corresponding to example game devices are previously provided in a server. One of the game devices obtains a character from another one of the game devices when these game devices pass each other. The one of the game devices processes the obtained character and transmits the processed character to the web page corresponding to the other game device in the server, and the character is stored in the server. The other game device accesses the web page corresponding to the other game device in the server to obtain the processed character.