-Go to any area and 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 might not appear at first but keep doing it. Note: Do not save the game as this wastes time. The log will give you information such as where he is from, about his family, about the Pikmin and creatures, etc. Note: This doesn’t work on the first or last day in the game.
-To see the pages where Olimar writes his thoughts, press Y on the area selection screen.