Hocotatian
Hocotatians are apparently the dominant species of the planet Hocotate. They are referred to as "Hocotatians" in The Ship's announcement of the Massive Receptacle Series. They are about the size of a nickel (~2cm, ~0.7in), and appear to be more advanced than humans, and have superior, or at least equal intelligence. They are capable of efficient extraterrestrial exploration and interaction, and use devices far beyond the current technology of humans. Their primary means of communication is speech, and they are able to read and write. It's also possible that they may be related to the Koppaite because they share a similar appearance and speak the same language.
Anatomy
Hocotatians bare multiple resemblances to humans, including expressing human-like emotions. Physically, Hocotatians have a humanoid shape, the main difference being a larger head-to-body ratio, and having much larger noses. However, their eyes are very different compared to a human's eyes, in that their shape changes for showing emotions because Hocotatians do not have eyebrows. In a "neutral" state, the pupil is heavily dilated, giving their eyes the appearance of being entirely black, which leads some people think they are actually closed. When surprised, the Hocotatian's pupils shrink and expose their irises, making them more closely resemble humans' eyes. This can be seen in a Pikmin 2 cutscene shown after completing the debt, and every time Olimar is hit in Super Smash Bros. Brawl.
Their respiratory system also works differently from humans. While oxygen is one of the keys to human survival, it is incredibly toxic to the Hocotatians. Unfortunately, PNF-404's atmosphere contains high amounts of oxygen, thus prohibiting its exploration without the aid of spacesuits. It is not known what sort of gas they breathe.
Life style
Hocotatians are a commercialized civilization, their currency being the Poko; commercial service and office exist in Hocotatian culture as well, with references to loan companies, along with the concept of loan sharks. The species has similar family structures to modern day western cultures: that is, husband, wife, children (normally a daughter and a son), and even pets.
In Pikmin 3, Alph refers to Hocotatians as "treasure-loving vegetable-eaters", stating that meat rarely gets eaten on Hocotate. Strangely, many of Louie's dishes in Pikmin 2 involve meat, which Brittany is surprised to hear. In a conversation on the S.S. Drake, it is even stated that Hocotatians are vegetarians, and they discuss how Louie has survived by eating the creatures on this planet.