Koppai

Koppai is a planet depicted as having a very thick atmosphere, covered in large cloud masses, and described as being partially sandy and featuring hot springs. Koppai's gravity is ten times stronger than on PNF-404, indicating its extreme density, and its atmosphere has one-third of PNF-404's concentration, indicating why PNF-404's lifeforms can grow to be so large. Besides its dominant race, Koppai is also populated by various animals and vegetation.

Koppaites are the dominant species on Koppai. They are small and of a humanoid shape, have wide-open eyes, rounded ears, generally small but still bulbous noses, and grow at least a modest amount of hair on their heads. Their primary means of communication is speech, and they can read and write. Koppaites also have a very limited diet, highly favoring fruits over other foods as they contain a substance called Piktamin U, which they can metabolize, and can eat without ever feeling full. Though they can safely breathe oxygen, they still can not withstand exposure to great amounts of it.

=In fanon games=

In Pikmin Forever
In Pikmin Forever, Koppai and Hocotate have formed an alliance in order to explore and colonize PNF-404.

In Pikmin: Koppai Invasion
In Pikmin: Koppai Invasion, Charlie is assumed to stay on Koppai, searching for his rubber duck, while Alph and Brittany return to PNF-404.