Gen Jūken

Gen Jūken (幻獣拳?, "Mythical Beast Fist") is a fictional group of martial artists that appears as antagonists during the last quarter of the Japanese Super Sentai show Juken Sentai Gekiranger. Utilizes a golden qi called Genki (幻気（げんき）?, "Mythical Qi"), the Gen Jūken users seek to surpass the power of natural beasts by mastering the power of mythical beasts, with thirteen fighting styles based on the Five Sacred Beasts and the Chinese Zodiac. Overtime, the Gen Jūken revealed to be actually a front for Long to raise a potential human though the Infinite Path (無限道 Mugendō?), turning that person into a mindless monster that would destroy the world. All Gen Jūken users possess a gold-colored fighting form.

Rio
Rio (理央?) is the destined leader of the Gen Jūken, according to Long. Being the original user of the Rin Jū Lion-Ken (臨獣ライオン拳 Rinjū Raionken?), Rio accepts the title and undergoes Long's Gengi to be infused with Genki and embrace his destiny, becoming a master of the Gen Jū Gryphon-Ken (幻獣グリフォン拳 Gen Jū Gurifonken?) style. As a result, he can assume a new armored form called Gen Jū King Rio (幻獣王リオ Gen Jūō Rio?, 40-47) until he learns the truth behind his new-found power when he is nearly consumed by it and becomes the Destroyer (破壊神 Hakaishin?). He leaves the Gen Jūken soon after, purging the Genki in his body. His motif while Gen Jū King is the Huang Long, which is above the Four Sacred Beasts of Chinese myth.

Upon his transformation into the Gen Jū King, Rio says, "Pure fierceness, pure power, Leaving the world, one without equal." (強きこと、猛きこと、世界において、無双の者 Tsuyoki koto, takeki koto, sekai ni oite musō no mono.?)

The Four Mythical Generals
The Four Mythical Generals (四幻将 Shigenshō?) are the elite four of the Gen Jūken, whose loyalty is to the Gen Jū King and serve as his bodyguards. They each represent the Four Sacred Beasts of Chinese myth.