Go to any area. Once you gain control over Olimar, immediately go to sunset. Since there were no events during the day, Olimar will write about the background of the game in his diary. It will not appear at first, but keep doing it. Note: Do not save the game to avoid wasting days. The diary will give you information such as where he is from, about his family, about the Pikmin, etc. Note: This will not work if you are on the first or last day in the game.