Beast Man is Skeletor's main henchman. He is able to control all beasts and use them as weapons against Skeletor's enemies. Beast Man is also incredibly strong, and is capable of holding off the likes of Battle Cat in combat.
he clearly resents being bossed around by Skeletor and secretly desires to someday overthrow his master. This side of his character is brought to the forefront in the episode "Prince Adam No More", in which he is finally thrown out of Skeletor's crew. Feeling useless without the power of Snake Mountain behind him, he sets out to prove his worth by capturing King Randor by himself and bringing him to Snake Mountain. Although he succeeds in capturing the King, when He-Man comes to the rescue he is subjected once again to Skeletor's wrath and admitted back into his ranks purely so Skeletor has someone to vent his anger on.
But his final line in the episode "It's kind of nice to be home" indicates he now feels he belongs as Skeletor's underling, and subsequent episodes portray him mostly for comedy value, willingly succumbing to Skeletor's abuse and constantly bungling his schemes. Notable episodes for Beast Man in the show's later stages include "The Shadow of Skeletor" and "Orko's Return" which restore him to his original, darker portrayal, working independently and craftily to achieve his aims. The powers of Beast-Man are shown effective in some earlier episodes, such as "Creatures From The Tar Swamp", "A Beastly Sideshow" and "The Dragon Invasion". His ability to control animals is not impeccable, however. For instance, he cannot control Cringer, Battle Cat, a dragon defending her young, or Panthor.
Beast Man remained a fairly regular character throughout the run of the 1980s series, while some other earlier figures like Zodac, Mer-Man, Tri-Klops and Stratos gradually dropped out of sight when newer characters were released. He generally held his position as Skeletor's right hand man throughout the cartoon's run, although in some later second season episodes this position was occasionally filled by characters such as Clawful or Whiplash, as writers attempted to promote newer characters more prominently. Beast Man was often teamed up with Trap-Jaw, one of the other earlier characters to remain consistent through the show's life.
Beast Man's background is never mentioned in the cartoon, although the series bible states a surprising origin for him, explaining he was once a thuggish human from Earth called Biff Beastman who owned a farmyard on which he constantly abused the animals. He was recruited as chief technician on the spacecraft piloted by Marlena Glenn, which crashlanded on Eternia, but he wound up on Skeletor's homeworld of Infinita, where he was mutated into Beast Man and recruited by Skeletor. This origin story appears in a storybook entitled "New Champions of Eternia" but was unpopular with most of the show's writers and therefore excluded from the series.