Not much is known about Olimar. He lives on the planet Hocotate and works for Hocotate Freight, a long-haul, deep-space shipping company. He has a wife and 2 kids, a boy and a girl. Olimar is very small, at only about 1 inch (2.5 centimeters) tall.
One day, during an interstellar vacation, Olimar's ship is impacted by a rogue asteroid and is sent tumbling down onto a mysterious planet, with parts of his rocket, the Dolphin, breaking off and scattering across the land. When he awakes to find his ship in ruins, he decides that he must try to gather the parts and repair his beloved Dolphin in an attempt to return home. He then realizes that the atmosphere of the planet he has landed on contains an abundance of oxygen, which is poisonous to Hocotatians. His life support system can only keep him alive for 30 days. After exploring the area for a little while, he discovers an odd type of ship that resembles an Onion. When he disturbs it, a lone Red Pikmin seed flies out. Once it sprouts, Olimar plucks it from the ground and notes its striking similarity to a Pikpik Carrot, one of Olimar's favorite treats back on Hocotate. He notices that it follows him and takes instructions. With his new partner, he grows more pikmin, ventures across dangerous lands, and slowly collects his ship parts. Eventually, he says goodbye to his pikmin friends and returns home.
In Pikmin 2, Olimar has returned to his home planet of Hocotate, only to discover that the company he works for, Hocotate Freight, is in massive debt. The President explains that another employee, Louie, had been attacked by a ravenous space bunny whilst delivering a massive load of golden Pikpik Carrots, which gobbled up the entire shipment. In order to pay back the customers, he took out an enormous loan, but then had no way to pay it back, even after selling the company's best ships, including Olimar's Dolphin, which was confiscated upon his arrival. Hocotate Freight's only remaining ship then notices a bottle cap that Olimar had brought back as a souvenir and quickly analyzes it, discovering that it is of great value, a full 100 Pokos. The President then orders Olimar and Louie to return to the planet to gather more treasure in order to repay the company's debt of 10,000 Pokos.
Olimar also makes an appearance in Super Smash Bros. Brawl. He fights using the abilities of all five types of Pikmin, while keeping up to six Pikmin in his party at once. He is also much larger in size so that he can fight against his opponents properly.
See also: Pikmin (SSBB)