|This article is about a/an mecha in Juken Sentai Gekiranger.|
Beast-Fist God SaiDain (獣拳神サイダイン Jūkenshin Saidain) is the GekiBeast of Ken Hisatsu/GekiChopper. It is considerably larger and possesses more brute force than the other GekiBeasts and can also unify sets of GekiBeasts to amplify their power.
During the Fierce-Confrontational rebellion, Beast-Fist founder Bruce E was betrayed and murdered by three of his students who would go on to become the Kenma of the Confrontation Beast-Fist Akugata. After the Kenma were defeated and their souls imprisoned within the Kenma Bracelet, Sha-Fu and the other Kensei learned that their master's soul still remained and used the Virtuous Beast Sword to carve a vessel for it out of rock, which would later become SaiDain.
Years later, the Virtuous Beast Sword was entrusted by the Kensei to Ken, only to have it stolen by Mele who gave it to Rio so the two of them could enter Jugenkyo and take Bruce E's power for Rio's use. The Gekirangers and the Kensei followed them and during the battle, Ken was able to reclaim the Virtuous Beast Sword and, with it, also obtained the awakened SaiDain as his personal GekiBeast.
When SaiDain awoke, the Soul of Brusa E was released on the Gekirangers as well as Rio and Mele in a rain of light called Beast Power Bloom (獣力開花 Jūriki Kaika), multiplying their strength tenfold and showing that, despite the difference in their philosophies, Brusa E looked favorably upon both Beast-Fist styles while the Kensei and Kenma were both excluded due to them straying from Beast-Fist's true path.
Appearances: Gekiranger Episodes 34-48, Go-Onger vs. Gekiranger
Beast-Fist Giant God SaiDaiOh
In addition to it's beast form, SaiDain can transform into a humanoid version, Beast-Fist Giant God SaiDaiOh (獣拳巨神サイダイオー Jūken Kyojin Saidaiō, Beast-Fist Giant God Big Rhino King) with the call of "Beast-Fist Giant God Descending" (獣拳巨神降臨 Jūken Kyojin Kōrin), or more simply, "Beast-Fist Transformation!" (獣拳変形 Jūken Henkei).
In this form, SaiDain's horn becomes the Smashing Big Sword (砕大剣 Sai Dai Ken) and its back becomes a shield, which is marked by the kanji for "large" (大 Dai). When encountered by intense enemy fire, SaiDaiOh's helmet can close around its head for additional protection
It has a total of three Fierce Techniques to it's arsenal:
- The Smashing Great Exploding Connection (砕大爆連 Saidai Bakuren), where SaiDaiOh slams its sword onto the ground, sending an explosive shockwave into the target.
- The Great-Great Smashing Great Slash (大大砕大斬 Dai Dai Sai Dai Giri), SaiDaiOh's signature finisher as a standalone mech, where the Smashing Big Sword extends its blade before SaiDaiOh slashes the opponent three times, creating the "Dai" (大) kanji as the enemy is destroyed.
- The Great Iceflow Mountain (大氷塊山 Dai Hyōkai Zan), where SaiDaiOh spins the sword at insane speeds, creating a gust of freezing wind that freezes the target in place. At the end of Lesson 43, Ken used it to create a giant iceberg which he then carved into a sculpture of the young boy Carl's dead mother to grant the child's Christmas wish of seeing her again.
Appearances: Gekiranger Episode 34-39, 41, 43-45, 48
Herculean Giant SaiDaiGekiFire
SaiDain can combine with GekiGorilla (in GekiFire form) to form the centaurish SaiDaiGekiFire (サイダイゲキファイヤー Saidai Gekifaiyā), with GekiWolf riding its shoulders and GekiGazelle and GekiPenguin running alongside it. In this form, SaiDaiGekiFire combines the energies of Kageki (the main Gekirangers), Shigeki (GekiViolet), and Geki Hard Kensan (GekiChopper), into its attacks. It's finisher is Fire Smashing Big Assault (ファイヤー砕大突撃 Faiyā Sai Dai Totsugeki), where SaiDain knocks the opponent into the air with a double slash of its horn where GekiWolf, Penguin, and Gazelle attack it in turn before GekiFire finishes it off with its double swinging fists.
Appearances: Gekiranger Episodes 35, 40, 43
Beast-Fist Giant SaiDaiGekiTohja
GekiTiger (in GekiTohja form) can also combine with SaiDain to form SaiDaiGekiTohja (サイダイゲキトージャ Saidai Gekitōja), with GekiWolf on its shoulders and GekiCheetah and GekiJaguar running alongside him. It's finisher is the Smashing Great Firm-Firm Attack (砕大頑頑撃 Sai Dai Gan Gan Geki), where GekiTiger spins while GekiJaguar, Cheetah, and Wolf run in circles around SaiDain; creating a tornado that deflects enemy attacks and knocks them into the air where they are attacked by Jaguar, Cheetah, and Wolf before SaiDain finishes them off with a triple slash of its horn.
Appearances: Gekiranger Episode 42
Beast-Fist Giant SaiDaiGekiRinTohja
SaiDaiGekiRinTohja (サイダイゲキリントージャ SaiDaiGekiRinTōja) is the true form of SaiDaiGekiTohja as well as the final and ultimate Beast-Fist combination; utilizing GekiBeasts and RinBeasts to unite all aspects of Beast-Fist martial arts: Geki, Shigeki, Geki Hard Kensan, and Ringi. It can attack with the RinChameleon's tongue as a rope dart/whip, fire Ringi blasts from the RinLion's mouth on its torso, and it's finisher is the Smashing Great Fierce-Confrontational Slash (砕大激臨斬 Saidai Geki Rin Zan) where SaiDain knocks the opponent into the air with a double horn slash, allowing GekiWolf, Cheetah, and Jaguar to attack them in midair before GekiRinTohja finishes them off with a spinning slash of its sword. SaiDaiGekiRinTohja's power was so great that even Long was unable to stand against it.
Appearances: Gekiranger Episode 47, Go-Onger vs. Gekiranger
The GekiBeasts are the Greater Power of the Gekirangers which is utilized by the Gokaigers using their Ranger Keys. As one of the five personal GekiBeasts, a Geki manifestation of SaiDain was summoned by the Gokaigers to allow GokaiOh to perform the Gokai Great Geki-Geki Beast (ゴーカイ大ゲキゲキ獣 Gōkai Dai Geki Geki Jū) finisher which destroyed Cosmic Kenpō Master Pachacamac XIII.