Mario and Sonic have arrived at the Olympic Stadium in Toyko, excited for the Olympic Games. A short while later, Toad arrives with a gift that is addressed to both Mario and Sonic. They open it to find a retro video game system inside with a letter that reads, "To Mario and Sonic with love, in commemoration of the Olympic Games in Tokyo! We made a little game to let you experience the past Olympic Games in Tokyo. By all means, give it a try!" While Sonic is trying to figure out who sent it.