| Bionoids 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 |
| Hyenanoid Episode 09 |
| Nightmarenoid / Akumunoid Episode 10 |
| Hedgehognoid / Urchinoid The first Biolon killed Naoto as he was defending Doctor Igarashi. Flashback episode. Episode 11 |
| Skunknoid Episode 13 |
| Killernoid Episode 14 |
| Wolfnoid / Ookaminoid Episode 15 |
| Jellyfishnoid / Kuragenoid Episode 16 |
| Agehanoid 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 |
| Hunternoid 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 |
| Doublenoid Episode 29 |
| Kabukinoid Episode 30 |
| Shinobinoid Episode 31 |
| Distnoid 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 |
| Chambaranoid 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 |
| Panthernoid Episode 40 |
| Anacondanoid / Uwabaminoid Episode 41 |
| Tyrannosaurusnoid 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 |
| Cobranoid 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 |
| Suitorunoid 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 |
| Unicornnoid 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 Movie |
| Batblock Movie |
| Ammoblock Movie |
| Spiderblock Movie |