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 d…

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…

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 - te…

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 Dea…

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,…

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 g…

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…

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! O…

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 usi…

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 completel…

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 be…

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 str…

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! Episod…

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 some…

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 gra…

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 the…

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 f…

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 j…

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 …

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 le…

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 ti…

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 …

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 a…

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 complete…

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 …

Aramis warns Misha about Raphael's impending threat to destroy the Machine Empire, but her warnings are dismissed, and command of her troops is transferred to Juggler. Meanwhile, Karen discovers that …

In a flashback to Fou's troubled childhood in the war-torn Sodom, he rejects the teachings of the church where Lily and Quattro tried to befriend him. During a raid, the church is bombed, leaving Lily…

In a flashback, Lily is buried on a hill on the outskirts of Sodom. As Quattro vents his anger on Fou, Machine Empire soldiers bomb what's left of the city, taking the unconscious boys to become futur…

As Teppei and X journey towards The Area, they're pursued by the repaired and enhanced Metal Face and Madonna. They stumble into a trap zone that attacks intruders, but Shadow X, who appears damaged, …

Teppei and X are attacked not long after leaving Metal Face. Arrows are appearing from out of nowhere! Then Ron and Raido, Fou and Je'taime, and Hokuto and Max show up and start attacking them! Or are…

Teppei wakes up in a nightmare... Meimu tells him that if he wants to escape, he must defeat the monster. Yet, every time he defeats the monster, it comes back stronger! What can he do? The damage…