HISTORY: The Bi-Beast was created many years ago by the Avian race (a sub-species of the Inhumans, which are a sub-species of humanity). The top skull was given knowledge of warfare while the bottom skull was given cultural knowledge, but both lacked knowledge of science. Eventually, the Bird People seemingly died out and their machines ceased function. The Bi-Beast remained on Sky Island, alone and waiting.

The Bi-Beast abducted the Harpy; whose wings made her resemble the Bi-Beast’s creator; and the Hulk, bringing them to Sky Land. The Bi-Beast forced Banner to repair the Bird People’s machines, but Banner instead tried to cure the Harpy. Before he could finish, the Bi-Beast attacked, fighting the Hulk until MODOK and AIM arrived and claimed the island, mortally wounded the Bi-Beast. Rather than let Sky Island into AIM’s hands, the Bi-Beast activated its self-destruct mechanism.

The Bird People had made (at least) two Bi-Beasts. Another Bi-Beast gained the knowledge of its predecessor, as well as the scientific knowledge of the Bird People. S.H.I.E.L.D. unwittingly brought the dormant Bi-Beast aboard their Helicarrier. The Bi-Beast revived and quickly took control of the ship, planning to slaughter the human race for destroying the Bird People. General Ross Managed to transport the Hulk aboard and he stopped the Bi-Beast from launching nuclear missile at Earth. After a brutal struggle, the Bi-Beast and the Hulk were dumped out of a portal, plummeting many miles to the ground below.

Bi-Beast was washed onto an Island, and enslaved the crews of passing ships; he repaired Sky Island and prepared to attack humanity, but was defeated by Thor. He was freed by the Man-Beast, who siphoned off his power, making the Bi-Beast smaller although it retained its strength. Both were defeated by Thor and Iron Man.

Bi-Beast eventually became a prisoner of the Stranger on his laboratory world under unknown circumstances. The Strange briefly freed him to obtain the gems known as the Family Jewels, during which time he fought the Hulk and She-Hulk.

The Hulk and his fellow Defenders were transported to the new Sky Island, where he encountered the Bird People who had survived in suspended animation. The Hulk immediately attacked Bio-Beast, refusing to back off until the Valkyrie calmed him down.

HEIGHT: 7 ft. 6 in. (formerly 20 feet)
WEIGHT: 360 lbs. (formerly 1000 lbs.)
EYES: Black
HAIR: None

SUPERHUMAN POWERS: The Bi-Beast is extremely durable. Only one of his brains sleep at a time.

SPECIAL SKILLS: Bi-Beast possesses nearly unlimited amounts of knowledge on warfare, culture, and science.

COSTUME: At one point Bi-Beast wore a high-tech exoskeleton to enhance his strength.

SIGNIFICANT ISSUES:
Abducted Hulk, defeated by MODOK (Incredible Hulk Vol. 2 #169, 1973)
Commandeered S.H.I.E.L.D. helicarrier (Incredible Hulk Vol. 2 #215-216, 1977)
Rebuilt Sky Island, defeated by Thor and Iron Man (Thor Vol. 1 #315-316, 1982)
Revealed to be a prisoner of the Stranger (Quasar Vol. 1 #14-16, 1990)
Battled Hulk and She-Hulk (Incredible Hulk Vol. 2 #412, 1993)
Fought Hulk on Sky Island (Defenders Vol. 2 #6, 2001)

NOTE: Updated from The Official Handbook of the Marvel Universe: Hulk 2004