This list of mythical creatures that begin with this letter and I am constantly gathering information from each continent, and is continually being updated.
Baku (Japanese)
Baku are Japanese supernatural beings that are said to devour nightmares. According to legend, they were created by the spare pieces that were left over when the gods finished creating all other animals. They have a long history in Japanese folklore and art, and more recently have appeared in manga and anime.
The traditional Japanese nightmare-devouring baku originates in Chinese folklore about the mo (giant panda) and was familiar in Japan as early as the Muromachi period (14th–15th century). Hori Tadao has described the dream-eating abilities attributed to the traditional baku and relates them to other preventatives against nightmares.