Monsters of the week, the product of Doctor Kiba's research. They can disguise themselves as humans.
Chamelenoid / Kamerenoido
Posed as a middle-age man to steal top-secret files. Fire missiles from his chest.
Episode 01
Catnoid / Nekonoid
Episode 02
Mudnoid / Doronoid
Episode 03
Rosenoid / Baranoid
Episode 04
Octopusnoid / Takonoid
Episode 05
Vulturenoid / Hagetakanoid
Episode 06
Influenzanoid / Kazenoid
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.
Episode 07
Molenoid / Moguranoid
Episode 08
Episode 09
Nightmarenoid / Akumunoid
Episode 10
Hedgehognoid / Urchinoid
The first Biolon killed Naoto as he was defending Doctor Igarashi. Flashback episode.
Episode 11
Episode 13
Episode 14
Wolfnoid / Ookaminoid
Episode 15
Jellyfishnoid / Kuragenoid
Episode 16
Episode 17
Starfishnoid / Hitodenoid
Episode 18
Injectnoid / Chuushanoid
Episode 19
Moneynoid / Kanenoid
Episode 20
Bugnoid / Mushinoid
Made from the eggs of a bug stolen from a little girl by Biolon during a burglary.
Episode 21
Episode 22
Goatnoid / Yaginoid
Episode 23
Suicidenoid / Jisatsunoid
Episode 24
Explodenoid / Bakuhanoid / 25
Dragonoid / Ryuunoid
Episode 26
Centipedenoid / Mukadenoid
Episode 27
Elephanoid / Zounoid
Episode 28
Episode 29
Episode 30
Episode 31
Episode 32
electric fishnoid / Raigyonoid
Episode 33
Rhinonoid / Sainoid
Was a 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
Episode 34
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.
Episode 36
Tortoinoid / Kamenoid
Episode 37
Mushroonoid / Kinokonoid
Disseminates spores that cause laziness in people, including Kiyoshiro and local traffic officer Kotani, who decide to leave town on a fishing trip.
Episode 38
HermitCrabnoid / Yadokarinoid
Episode 39
Episode 40
Anacondanoid / Uwabaminoid
Episode 41
Not active as a monster; actually a suckling needing electricity to grow, provided by Namazunoid.
Episode 42
Catfishnoid / Namazunoid
Electricity stealer, which he uses to power the incubator for Tyrannosaurusnoid.
Episode 42
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.
Episode 43
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. (Episode 44
Squidnoid / Ikanoid
Episode 45
Episode 47
TempleBellnoid / Tsuriganenoid
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.
Episode 48
Fakemomnoid / Nisehahanoid
Episode 49
Great Gibanoid / DaiGibanoid