Pollutant

Pollutant is the final enemy fought in Pikmin: The Last Battle, and the true final boss. It is a strange, spirit-like entity who can generate hazards and obstacles. It is also the reason that the Plasm Wraith is in pain, and has now damaged it even more. It caused PNF-404 to fall into ruins, and can be considered the main antagonist of the Pikmin franchise. It's true origins remain a mystery, but judging by it's name, it is somehow the living body of pollution, and was therefore somehow created by the old inhabitants of PNF-404.