Koppai

Koppai is the home planet of explorers Alph, Brittany, and Charlie.

In the canon games
Koppai is first seen in . In that game, its inhabitants, the Koppaites, are undergoing a food crisis due to poor planning and ravenous appetites. To solve their crisis, they search for planets with an abundance of edible matter, and discover PNF-404. Alph, Brittany, and Charlie are sent to explore the planet on a mission to return with food. Koppai's fate is unclear, since Pikmin 3 has different endings based on how much fruit was collected.

Pikmin: Forever
In Pikmin Forever, Koppai and Hocotate have formed the Koppai-Hocotate Alliance in order to explore and colonize PNF-404.

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