"Demon Beast" is the literal translation of 魔獣 (Majū), refering to the monsters in Kirby: Right Back At Ya! that are created by NME (Nightmare Enterprises) who are sold for very high profit.

This tag is to only be used for the monsters that originated from Kirby: Right Back At Ya!. However, characters that are present in the games as bosses or mid-bosses (such as Lololo and Lalala and Paint Roller) are exempt from the tag.

It is shown that demon beasts can have multiples of their kind created, so this would make their tags species tags, with a few obvious exceptions.