Dr. Mario Online Rx, stylized as Dr. Mario Online ℞ and released in PAL regions as Dr. Mario & Germ Buster, is a puzzle video game starring Dr. Mario. It was one of the WiiWare launch games in Japan, Europe, and Australia, and was released in 2008 on March 25 for Japan, on May 20 for Europe and Australia, and for North America on May 26.