A Pikmin Extinction is an unfortunate event that can occur in both Pikmin and Pikmin 2. It occurs if, after Day 1 in either games, your total number of Pikmin in the Field and in the Onions reaches 0. After Olimar or The Ship mentions it, the day will automatically end. The next day, each Onion will release 1 sprout of each color, allowing you to rebuild your Pikmin count from the beginning.