Teppei's brother Kotaro is a scientific genius and is kidnapped by the Machine Empire. Teppei gives chase and ends up in the Area of the Machine Empire! He is attacked by the B't Madonna and her donor Metal Face. Badly injured and bleeding everywhere, Teppei fights back, but he's no match for the B't Madonna! However, Teppei's blood reactivates X, whose body had been buried in the scrap pile. Once again active, X breaks free of the scrap, while Madonna has to take her donor Metal Face back to the Machine Empire for treatment. He had been seriously injured by Teppei just moments earlier. Meanwhile, Kotaro awakens in the Machine Empire. Major Aramis tells him about the Area and the B't's. She also starts to explain about the ultimate B't - Raphael. Asked to join them, Kotaro turns them down. He has faith in his brother and knows Teppei will be coming to save him!

Episode summary graciously provided by Vortex Fansubs

Teppei thinks he has gained Karen's powerful partner X, as an ally! He soon learns differently. Not long after Metal Face and his B't Madonna leave, X and Teppei are attacked by the Fifth Unit Ryukon Troops. Can Teppei and X overcome their problems and work together to defeat the Fifth Unit???Vortex Fansubs

X's original donor is Karen and he'll obey only her! He's going to do everything he can to get rid of Teppei and go to find Karen! Teppei finally realizes that X isn't just a robot and gives up - telling X where he can find Karen. He then proceeds back into the Area alone and is soon attacked by the Ryukon Troops. Can Teppei defeat all of them by himself or will X return to help him???Episode summary graciously provided by Vortex Fansubs

X is finally willing to cooperate with Teppei. Suddenly, one of the best fighters in the Machine Empire appears before them! Fou Rafine, and his B't Je'taime! Je'taime's sonic attack is called the Deadly Carol. X and Teppei have never been up against fighters as strong as these two!Episode summary graciously provided by Vortex Fansubs

When Teppei comes around after his last battle, he finds himself being treated in Fou's chapel! X, however, has been deactivated and is lying motionless... One of the Machine Empire's hit men, Kaas, shows up and takes some of the children hostage to use against Fou. Je'taime, Fou, and Teppei and X must work together to stop the soldiers from getting away and reporting back to the Empire!Episode summary graciously provided by Vortex Fansubs

Teppei and X finally make it to the first point! Here, they meet a huge robot named Big Rock who is piloted by a young boy named Gaku. The robot doesn't last long against X and that's when the true guardian for this point shows up! This point is guarded by a B't named Groupie that can eat ANYTHING!! Humans, robots, tanks....you name it! His donor is Captain Hook. Captain Hook feeds Gaku to his B't and Teppei and X allow themselves to be eaten also, so they can rescue the boy! Will they get out alive?????Episode summary graciously provided by Vortex Fansubs

X and Teppei thought that Captain Hook and his B't had been defeated! But he hadn't!!! Captain Hook gives them a taste of his weapon, the Hanging Rod and just about fries them. His B't Groupie revives also and comes back to try and eat them again. X is damaged, but he and Teppei must still overcome these two again if they're going to continue into the Area!Episode summary graciously provided by Vortex Fansubs

Gaku has been poisoned by the ""Heavy Steam"" given off by Groupie. X and Teppei must rush to the next point, where an oasis can be found. They have to wash the poison off of Gaku and themselves! One BIG problem though! This oasis is protected by the illusionist Kamiura and his B't Mirage. Without even knowing that they were already caught in his illusion, X and Teppei start to fight each other...Episode summary graciously provided by Vortex Fansubs

Teppei and X break free from the illusion! X goes after the B't Mirage and Teppei goes after Kamiura. Both of them have already been affected by the Evil Flower pollen. Kamiura attacks Teppei by using illusions and Teppei has to break free from yet another trap before he can defeat Kamiura!

X has to shut down all of his senses to attack Mirage and they have a serious battle... Episode summary graciously provided by Vortex Fansubs

X and Teppei are attacked by the B't Madonna and Metal Face. They force X and Teppei to crash into a deadly valley. It's a place where the sound of the wind can affect a B't and shatter them completely!! But, there was a man who came and helped them. He is Professor Zaji and he's wanted by the Machine Empire.

To escape from the valley and rescue the Professor, X and Teppei must be united to overcome the effects of the wind! Episode summary graciously provided by Vortex Fansubs

Without warning, B't Raido appeared in front of Teppei and X! His donor is one of the greatest fighters in the Machine Empire. His name is Ron. Teppei and X have never fought anyone as tough as Ron before! He has the power of one of the Spirit Generals! Episode summary graciously provided by Vortex Fansubs

Teppei and X continue on their journey into the Area. They meet a mysterious old man named Kaos... Kaos and his B't Lamu used to be legendary warriors for the Machine Empire! X and Teppei must struggle to stay alive as Kaos and Lamu attack them! Episode summary graciously provided by Vortex Fansubs

B't Lamu and the warrior Kaos are very good! Kaos attacks and cuts Teppei through his Battle Gear! Teppei and X will win though, no matter what it takes! They'll become the best of buddies! Episode summary graciously provided by Vortex Fansubs

Teppei and X arrive at the next point and find themselves in a huge graveyard. In the middle of the graveyard is a giant tree full of skeletons! They meet a girl named Maria, who is terrified of something evil that lives there! Can Teppei and X help Maria and defeat this point's guardian??? Episode summary graciously provided by Vortex Fansubs

X has received a lot of damage from the Reaper! Teppei and X are in serious trouble! They must become united to save themselves from total destruction and fulfill Maria's dreams! Episode summary graciously provided by Vortex Fansubs

Teppei and X are finally united! X has revived his Prism of Aura and they have defeated the Reaper. X is still terribly damaged from the battle though, and now another enemy shows up in front of them!

X might die... Episode summary graciously provided by Vortex Fansubs

X is trying to fly Teppei as close to the Area as possible before he dies. Now another of the Machine Empire's hit men shows up to attack them! His name is Rai of the Dark Knights. When Teppei and X fight back with the Prism of Aura, Shadow X appears!Episode summary graciously provided by Vortex Fansubs

Kotaro struggle to figure out a way to destroy Raphael! If Raphael keeps metamorphasizing, he'll absorb the entire planet! Kotaro has to figure out WHAT Raphael is and keep from being killed by his jailer in UnderHell! Meanwhile, Fou, must battle one of the Dark Knights to save Karin!Episode summary graciously provided by Vortex Fansubs

X is dying, and now the strongest of the Dark Knights, Mira, shows up to stop them! Teppei fights back with his Messiah Fist to try and keep X out of it, but X wants no part of it and attacks on his own. Only united do they stand a chance, and Teppei rejoins X. They use the Prism of Aura at full power and stop Mira, but it uses everything X has left.... Episode summary graciously provided by Vortex Fansubs

When Teppei comes to after the last battle, he finds X in pieces in front of him! Someone has dismantled him!!! He finds out that he's been rescued (or has he??) by Hokuto and B't Max - one of the legendary Spirit Knights of the Machine Empire! What will Teppei do without X? Episode summary graciously provided by Vortex Fansubs

Hokuto has indeed rescued Teppei AND X! B't Max rebuilt X into the Neo B't X!! Bigger, badder, and better than ever! X and Teppei were flying away from B't Max when they were attacked again, this time by Balzac and his B't Savanna. Teppei and X are much more powerful than before and this enemy is no match for the Neo B't X! Episode summary graciously provided by Vortex Fansubs

Teppei and X meet up with Fou and Je'taime and Hokuto and B't Max again. Teppei and X have to battle their way into the Machine Empire. These enemies are so strong, it's unbelievable!! They have to make it though, if they're going to get into the Area and rescue Kotaro! Episode summary graciously provided by Vortex Fansubs

It seems like an endless fight to destroy the B't Lalaynya and her donor Myslim! No matter what X and Teppei do, she regenerates and comes after them again! It's been a very hard battle... Can X and Teppei defeat this evil Knight??? Episode summary graciously provided by Vortex Fansubs

Teppei and X find out that they have defeated Lalaynya, but not Myslim! Myslim counterattacks with his Cyber Whip and hits Teppei! The poison causes Teppei to go blind. Teppei has to trust X completely and X responds by creating a new counterattack:Shining Wings! Episode summary graciously provided by Vortex Fansubs

Hokuto and Fou are on their way into the Area to clear up some doubts about the Machine Empire. X and Teppei are also trying to go to the Area, but Ron of the East tries to stop them all! He asked to Teppei to prove he has a piece of the sun and attacks! For everyone hoping for a conclusion to the story, give up that thought. This story is UNFINISHED and takes up exactly where this episode stops in Neo B't X- the OAV series!!! Episode summary graciously provided by Vortex Fansubs

铁兵，北斗，龙和凤正在前往基地的路上。 龙和他的B't雷童率先离开，而其他人继续他们的旅程。 但是，他们没有走多远就被其中一个魔将阻挡了去路。 他名叫库亚多罗，对凤怀有怨恨。 库亚多罗和凤一起长大，但库亚多罗认为凤杀了他的妹妹莉莉。 在凤的请求下，铁兵和北斗先行离开，却被由贾古拉控制的留加旺部队袭击。 他们不是铁兵和新生B't X的对手！ 贾古拉告诉他们凤已经投降了库亚多罗，铁兵决定回去救凤。

在这一集详细介绍了凤和库亚多罗的背景。披露了更多关于莉莉以及机械帝国动机的信息。凤已经投降，并且被库亚多罗打成重伤。就在库亚多罗即将杀死凤时，铁兵和X及时出现阻止。然而，他们发现库亚多罗并不是一个容易对付的敌人。库亚多罗再次袭击凤，这次使用了他的绝技“幽灵金属”，而朱德姆牺牲自己来拯救凤...

朱德姆被杀死后，库亚多罗再次袭击凤。铁兵和X试图阻止他，这给了凤足够的时间来恢复他的小提琴。他演奏了一首他以为已经忘记的旋律...天使之歌。这首歌使朱德姆复活，并且以真正的凤凰之力重生。凤决定不再牺牲朱德姆，并一起对抗库瓦多罗和他的B't罗雷素。朱德姆的“死亡之礼赞”和凤在小提琴上演奏的旋律结合在一起，形成了“至福的交响乐章”。库亚多罗和B't罗雷素无法抵挡这一攻击，很快就被打败了。

铁兵和X继续前往基地的路上，突然被铁甲面发现。一场激烈的战斗爆发，危急关头铁兵和X被华莲的B't Shadow X所救。Shadow在战斗中受到了严重的损伤，他们把她带去了北斗那里。北斗修复了Shadow，并让她获得了言语的功能。Shadow告诉X，X是她的哥哥，而X告诉Shadow她必须回去保护华莲。Shadow应允并返回了神居岛。

Shadow离开后，铁甲面立刻出现了。北斗和B't马克斯继续前往基地，留下铁兵和X去对抗铁甲面。

很快，铁甲面和他的B't马度那被打败了。铁兵救了铁甲面免于坠落致死，而X则告诉马度那，B't不仅仅是一台战斗机器。它们也有温暖的心，就像人类一样，可以自己做决定。

铁兵和X离开铁甲面不久就遭到了袭击。箭矢从不知道的地方出现！然后龙和雷童，凤和朱德姆，以及北斗和马克斯出现并开始攻击他们！这原来是噩梦的大师——邪恶的冥梦和他的B't万圣节的杰作。他们已经开始迷惑铁兵和X了！就在他们之间的战斗开始之时，铁甲面和他的B't马度那再次出现！并声称只有他才能杀死铁兵。冥梦感到恼怒，于是攻击了铁甲面和马度那，后来被铁兵和X所救。

马度那在战斗中受了致命伤。冥梦用他的绝技“Final der Mogliche”袭击铁兵，B't 万圣节再将铁兵送入了“Dark Inferno”的终极噩梦中！究竟铁兵和X能赢得这一场战斗吗？！

铁兵醒来时发现自己陷入了噩梦之中... 冥梦告诉他，如果他想要逃脱，必须打败这个怪物。然而，每次他打败怪物，它都会变得更强！他该怎么办？他所受到的伤害正在影响他的真实身体，如果他不逃脱，他很快就会死亡！与此同时，B't万圣节袭击了X。经过多次的攻击，似乎冥梦赢了。铁兵无法打败怪物...当他濒临死亡时，他听到了X的声音...X正在呼唤他！X提供了自己的生命，这样铁兵就可以燃烧他的太阳之碎并重获自由。铁兵说再也不要！他只剩下自己的生命，这就是他要用的。当冥梦的怪物准备结束他时，铁兵“升华”了。

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