Bigfoot

Bigfoot is a supposedly ape-like creature inhabiting forests, mainly in the Pacific Northwest region of North America. It is described usually as a hairy, ape-like humanoid.

Its only mention in the Metroid series has been in Metroid Prime 2: Echoes, when he was mentioned in PFC I. Crany's log entry: "But if she wants to believe in this Samus, Bigfoot and Santa Claus, she can."