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This article is about a/an kaijin in Kamen Rider Black RX.

A green and white-furred shaman with bat wings for ears. It's armed with a skull-headed staff and bananas that can be used as weapons as well as for other purposes. Byakki used his bananas to infiltrate a gold depository to steal the gold. Joe told Kohtaro about a weird old man who bought bananas from his banana stand after following him to his house. Shigeru and Saburo stumbled into his house and were captured. When Shunkichi learned about the weird old man from Kengo, he arrived to try to find his son only for Kohtaro to show up. When Shunkichi refused to let Kohtaro do it, Joe Punched him out. Kohtaro then found Shigeru and Saburo as the weird old man revealed his true form of Bya Fiend and attacked him. Byakki threw a banana into Kohtaro's chest knocking him out and then kidnapped him. Atop a building, Byakki tried to use a big banana to push the impaled banana further into his chest, until it broke. Kohtaro then revealed himself to be alive as he used his Robo Rider ability in a spit second transformation, which made it look like the banana to pierced him. Kohtaro transformed into Kamen Rider Black RX. After some banana attacks from Bya Fiend, RX became Bio Rider. While on Mach Jabber, Bio Rider attacked Byakki and used his liquid powers to evade his banana attacks. Bio Rider broke Bya Fiend's staff before destroying him with his Bio Blade.

See also

Kamen Rider
Kohtaro Minami
Gear
King Stone
Black: Battle Hopper - Road Sector
Black RX: Revolcane - Vortech Shooter - Bio Blade - Acrobatter - Ridoron
Allies
Black
Kyoko Akizuki - Katsumi Kida - Ryusuke Taki - Gorgom Shonen-Tai - Masaru Todo - Yoichi Daimon - Whale Mutant - Soichiro Akizuki
Black RX
Reiko Shiratori - Sahara Family - Joe the Haze - Kyoko Matoba - Goro
The Ten Veteran Kamen Riders
Takeshi Hongo - Hayato Ichimonji - Shiro Kazami - Joji Yuki - Keisuke Jin - Daisuke Yamamoto - Shigeru Jo - Hiroshi Tsukuba - Kazuya Oki - Ryo Murasame
Golgom
Creation King - Shadow Moon
The Three Gorgom Priests
High Priest Darom - High Priest Baraom - High Priestess Bishium
Bilgenia - Hideomi Kuromatsu - Handmaiden Mutants
Gorgom Mutants
Bat Mutant - Spider Mutants - Leopard Mutant - Silkworm Mutant - Flea Mutant - Goat Mutant - Eagle Mutant - Rhinoceros Mutant - Cicada Mutant - Bee Mutant - Lizard Mutant - Cactus Mutant - Longhorn Beetle Mutant - Crab Mutant - Mammoth Mutant - Tortoise Mutant - Earwig Mutant - Tapir Mutant - Black Cat Mutant - Aye-aye Mutant - Anemone Mutant - Jewel Beetle Mutant - Wasp Mutant - Chameleon Mutant - Ammonite Mutant - Coelacanth Mutant - Mantis Mutant - Buffalo Mutant - Slug Moth Mutant - Scarab Beetle Mutant - Armadillo Mutant - Squid Mutant - Porcupine Mutant - Mushroom Mutant - Red Salmon Mutant - Mole Cricket Mutant - Rat Mutant - Dogfish Mutant - Phantom Mutants - Centipede Mutant - Salamander Mutant - Cobra Mutant - Fly Mutant - Stag Beetle Mutant - Stickleback Mutant - Fleeing Mutants
Crisis Empire
Emperor Crisis
General Jark - Intelligence Staff Officer Maribaron - Naval Commander Bosgun - Armored Officer Gatezone - Fanged Captain Gedorian - Chakram- Dasmader - Chaps
Skullma - Skullmastars - Cublican - Gynagiskhan - Gungadin - Gynagamoth - Culculten - Bujin - Gynamite - Atchpetchy - Dogmalogma - Scryde - Zunojin - Flarmiglarmi - Deathgaron - Triplon - Nexticker - Musalabisala - Croyzel - Byakki - Bang-Gong - Antront - Gynabalas - Lickback - Gynakamakil - Gynagingam - Matbot - Gimelagomela - Mundayganday - Metaheavy - Elgitron - Ganma - Gazolagezola - Schraigin - Wilki - Balunbolun - Gynaninpo - Tenku - Spingrey - Gynajagram - Hundred-Eyed Hag - Gedoll Ridoll - Helgadem - Strongest Monster Granzyrus
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