Beasty takes the form of a formidable humanoid lion whose demeanor initially contradicts his appearance through pronounced cowardice. Encountering Dorothy and her companions traversing the Galaxy of Oz, he joins their group. His core motivation centers on seeking courage directly from Dr. Oz, paralleling the Cowardly Lion's original quest.

He travels alongside Dorothy, the robot Chopper, and Plantman as they pursue Dr. Oz and the potent Rainbow Crystal, an artifact capable of manifesting thoughts into reality. Beasty's character arc involves confronting his fears through shared adventures with this group.

The resolution arrives with the use of the Rainbow Crystal, which magically grants his wish for courage, fulfilling his central desire. This outcome, achieved through external magic, departs from the original narrative's focus on self-discovery.

The adaptation, condensing or omitting numerous episodic adventures from the full series, also streamlines Beasty's development. Consequently, his transformation from cowardice to courage occurs abruptly within this condensed narrative, lacking the extended journey of personal growth potentially present in the complete series.