"Also included in the Dr. Mario game is Wi-Fi play, allowing you to face off against players from throughout the world via the Wi-Fi Connection service. You can select to face off against a randomly selected opponent, or send out invites to friends who've recorded your Dr. Mario friend code. Your gaming buddies don't actually need a copy of the game, as Nintendo has implemented a download play feature for this game, which sends a limited versus-only copy to members of your Wii Friend List via Wi-Fi Connect 24."
http://wii.ign.com/articles/861/861755p1.html
http://wii.ign.com/articles/861/861755p1.html
