taken from wikipedia-
"New Play Control! Pikmin uses the Wii Remote, and requires the player to point and click on the screen to do various tasks instead of manually moving a cursor with a control stick. It was also announced that the game saves day-by-day records of the player's playthrough, allowing the player to restart from any recorded day of his or her choice. In an interview, director Shigefumi Hino stated that besides adding motion controls, they wanted to include the ability to go back to saves they have made in the past, allowing players to replay all 30 days one by one in order to improve"