Pikmin Spaceforce is a lost Flash Game that supposedly released on the original Pikmin website. The game seems to have disappeared around 2003, along with any information surrounding its gameplay.
Notably, the game had a leader board and signup boxes, suggesting it was likely scorebased. There was a countdown (similar to the pikmin day timer) to its release. The sites overview page also contained a separate movie each for the Red, Blue and Yellow Pikmin. What those videos are is as of yet unknown.
Clicking the Gamecube icon at the bottom of the page would have sent you to a separate website for the gamecube with something run by Flash. However we were unable to find out what it was.