Century King Shadow Moon

Biography
Nobuhiko Akizuki was born on the day of a solar eclipse alongside his stepbrother Kotaro Minami, revered by the Gorgom as the heirs to their leader's throne: the Century Kings "Shadow Moon" and "Black Sun". Raised together, the two were like brothers. Once the two were of the ideal age, Gorgom captured them and infused them each with a King Stone. While Kotaro manages to escape with his memory intact, Nobuhiko's mind was wiped clean while left in a state of suspended animation before being finally reborn as Shadow Moon through the Stones of Earth, Heaven, and Sea. Shadow Moon sets up his regime as a general of Gorgom, serving as Black's nemesis and forcing him to fight him so he can become the new Creation King. In their final battle, Shadow Moon is weakened by Kamen Rider Black after the Satan Sabre is used to slash his King Stone. Though he appears to die after being left inside the Gorgom headquarters when it explodes, Shadow Moon returns years later to seek revenge against Kotaro, who is now Black RX. However, he lost all of his memories related to Gorgom after its destruction. He is finally defeated by Black RX when he thrusted the Revolcane through Shadow Moon's King Stone, destroying it once more. He turns back into Nobuhiko, renouncing his evil ways as he saved two children trapped in the explosive lava, shortly before he dies. In all of Shadow Moon's appearances, he is voiced by Masaki Terasoma, including the 3D short film Kamen Rider World, the 40th anniversary film OOO, Den-O, All Riders: Let's Go Kamen Riders, and the Kamen Rider/Super Sentai crossover film Kamen Rider × Super Sentai: Super Hero Taisen.

Shadow Moon first appeared in episode 35. He was the result of Gorgom's long wait in trying to revive Akizuki Nobuhiko, Kotaro's brother. From the start of the series, he was kept inside a transparent ball for him to rest and finally transform into Shadow Moon.

In episode 17, Gorgom realised that Shadow Moon's life force was weakening after being kept inside the transparent ball for a long time. Therefore, the High Priests came up with the idea of capturing his sister, Kyoko, to transfer her life force into him to prolong his life. With the help of a Tapir monster, Gorgom managed to lure Kyoko out and inject some of her life force into the weakening Shadow Moon before Kamen Rider Black shattered their plans.

The High Priests tried the same plan again in episode 34 to awaken Shadow Moon. They captured Kyoko again but this time, Birugenia was there to foil their plans. He interrupted the process and took Kyoko away to lure out Kamen Rider Black.

Left with no other choice, the Creation King ordered the High Priests to use their life stones to awaken Shadow Moon. However, by doing this, it would mean that their lives would come to an end once all of their life force had been transfered to Shadow Moon. Nevertheless, they obeyed the Creation King.

Despite so many battles, Kamen Rider Black did not even come close to rescuing Nobuhiko. This gave ample time for him to fully transform into Shadow Moon. Once awakened from his long rest and fully transformed, the first thing that Shadow Moon did was taking back the Satan Saber which was in the hands of Birugenia. With the Satan Saber in hand, he killed Birugenia.

Maara & Kaara
In Episode 38, Shadow Moon introduced a couple of his creations to the Gorgom organization. He created two feminine masked creatures known as Maara and Kaara. Nothing useful done by them as they just stood at the side of Shadow Moon's throne. The purpose of their existence was to serve Shadow Moon if he were to succeed the Creation King. They were seen dancing when Gorgom wanted to give the title of King to Shadow Moon after Kamen Rider Black's death.

Abilities & Weapons
Shadow Punch, similar to the Rider Punch. The Shadow Punch clashed with Kamen Rider Black's Rider Punch. Shadow Kick It produced flickering green light and also clashed with the Rider Kick. Using the powers from his Kingstone, Shadow Moon could bring several monsters back from the dead. Seen in the second movie. The rays from the Kingstone could also teleport Kamen Rider Black to another dimension. A strong red light emitted from his fingers it was used to snatch the Satan Saber away from Birugenia. Another version of the red laser it was supposed to kill Kamen Rider Black but due to his quick moves, it accidentally killed Great Monster Bishium. While staying at Gorgom's shrine, Shadow Moon could communicate with Kotaro wherever he was Kotaro lost control of his motorcycle for a while when Shadow Moon got into his mind to remind him to start their battle.
 * SHADOW PUNCH
 * SHADOW KICK
 * Reviving dead monsters
 * SHADOW BEAM (Red variation)
 * SHADOW BEAM (Another Red variation)
 * Communicating through mind


 * SHADOW SENSOR

Shadow Moon knew when Great Monster Baraom had been destroyed the lights on his head flickered once Baraom was killed by Kamen Rider Black.


 * Kingstone reaction

Shadow Moon's kingstone sounded off at will this happened when Kamen Rider Black was about to be brought back to life with the help of the Whale monster.


 * SHADOW FLASH

With a quick flash of his Kingstone, Shadow Moon could take control of Battle Hopper since Battle Hopper was created for the next Creation King, its only natural that Shadow Moon could ride it as well.


 * SHADOW BEAM (Fist shot variation)

Shadow Moon fired a simple yellow beam from his fist onto Kamen Rider Black.


 * Blasts from his Kingstone

Before the Century Kings' final battle, Shadow Moon showcased his powers to Kamen Rider Black after getting some of the Creation King's powers, Shadow Moon fired several shots from his Kingstone.

Can teleport to and from battle
 * Disappearance

The Satan Saber, a special weapon created for the next Creation King. With the weapon in hand, Shadow Moon could shoot several beams from the saber or control his opponent's movements.
 * The SATAN SABER

Shadow Moon created a couple of his own weapons called the Shadow Sabers.
 * The SHADOW SABERS

Shadow Moon took control of Kasumi no Joe's mind and body. Joe started to attack Kotaro before Shadow Moon revealed himself.
 * Mind & body control

Shadow Moon fired several green lasers from his fingertips, strong enough to create a big explosion.
 * SHADOW BEAM (Green variation)

Shadow Moon, in giant form, fired several yellow lasers from his fingertips.
 * SHADOW BEAM (Yellow variation)

Another version of the beam from Shadow Moon's hand. Seen in Kamen Rider Decade' movie, All Rider vs Great Shocker, it was used to toss Rising Ultimate Kuuga out of his way.
 * SHADOW BEAM


 * Battle Hopper

Battle Hopper is a living motorcycle created by Gorgom, made specifically for the upcoming Creation Kings Black Sun and Shadow Moon. Battle Hopper was later stolen by Shadow Moon via his Shadow Flash before Black used his King Stone Flash to free him from Shadow Moon. As a result, Shadow Moon attacks Battle Hopper with the Satan Sabre and the Bike soon dies.

Trivia
Shadow Moon is one of the few villains in the Kamen Rider Series to be given an action figure,a Souchaku Henshin figure,a S.I.C. figure and a S.H. Figuarts figure.

He is also one of the few Kamen Rider villains to have a Rider Kick, without being a Kamen Rider himself.

Shadow Moon was also featured as the first Secret Rare card in the Rangers Strike Masked Rider Expansion Vol. 1 and the only character in the Dark Alliance group in the Masked Rider Expansion Vol. 1.