Monsters associated with the theme of transformation in mythology include creatures like the werewolf and the sphinx. These figures often reflect inner conflicts and the duality of human nature, representing the struggle between the civilized self and the primal instincts. In many myths, such transformations serve as metaphors for personal growth or societal challenges. For example, the werewolf embodies the tension between humanity and raw, animalistic urges, while the sphinx symbolizes riddles and the complexities of knowledge and wisdom. These monsters challenge heroes to confront their fears and emerge transformed.