Doctor Gibahttp://i231.photobucket.com/albums/ee121/Kainsword17/B... A brown-haired, bearded human-looking leader and founder of Bioron. His real identity is Gibanoid, a bio-monster born by accident from the chemical waste of Doctor Igarashi's National Science Academy Bio Laboratory. As a result, Giba is filled with malice for humans. He assumed his true form in the series finale, using Mayumi as a shield to escape in his ship. He died while fighting Jiban on his ship as it crashed into the mountainside.
Bionoids Monsters of the week, the product of Doctor Giba's research. They can disguise themselves as humans.
Influenzanoid (Kazenoid)http://i231.photobucket.com/albums/ee121/Kainsword17/B... The only Bioron with a heart. Originally a simple doll transformed into a carrier of a flu-like disease engineered by Bioron, he is nevertheless unable to hurt his previous owner (as a doll), a little girl.
Kabukinoidhttp://i231.photobucket.com/albums/ee121/Kainsword17/B... name refers to a form of traditional Japanese drama.He acts as kabuki acter.The monster was armed with props that related to kabuki.(Like "Big kiseru" "Kumonoito" "shower of blossom bomb")
Rhinonoid (Sainoid)http://i231.photobucket.com/albums/ee121/Kainsword17/B... Was an extreamly powerful bionoid able to withstand any of jibans attacks he worked with Madogarbo and together they and queen cosmos killed jiban he was later killed by a reserected perfect jiban
Chambaranoidhttp://i231.photobucket.com/albums/ee121/Kainsword17/B... Was a samurai who saved Yoko in past,but transformed into monster by Doctor Giba. The monster was armed with swords,chains, glue and a bomb in his body given by Madogarbo.
Mushroonoid (Kinokonoid)http://i231.photobucket.com/albums/ee121/Kainsword17/B... Disseminates spores that cause laziness in people, including Kiyoshiro and local traffic officer Kotani, who decide to leave town on a fishing trip.
Cobranoidhttp://i231.photobucket.com/albums/ee121/Kainsword17/B... Takes the appearance of an old lady to inject a drug on Yoko that is eventually carried over to Jiban after he rescues her from a Bioron attack. Uses a flute to control Yoko into hurting him.
Suitorunoidhttp://i231.photobucket.com/albums/ee121/Kainsword17/B... Was sent to suck out the mind of a brilliant scientist to make a cure for the Pollen a Space Butterfly was scattering about that put people (Even Marsha and Karsha) to sleep. Created by Queen Cosmos she attempted to get to the Scientist first but Suitorunoid absorbed not only the Scientist's mind but that of a young boy. When Queen Cosmos used her Mind-Snake on the Bionoid to release the minds the 2 got switched into the wrong body.
TempleBellnoid (Tsuriganenoid)http://i231.photobucket.com/albums/ee121/Kainsword17/B... Sent to protect Dr. Giba's Bionoid creation Lab. His sonic attacks scrambled Jiban sensors, severely damaging Jiban. But in the end was destroyed, as was the Bio Lab.