B't X (pronounced "beat x" and stylized as B'ᴛ X) is a Japanese manga series, written and illustrated by Masami Kurumada.

B't X is set on an alternate Earth, where a faction known as the Machine Empire rules a significant large piece of land known as "The Area" in the Gobi Desert.

A B't (pronounced "beat") is the ultimate form of mecha designed for fighting - the B stands for Brain, Blood, Bravery and Battler.

A B't is also outfitted with the Guard System, which protects its donor from various dangers and environment changes, such as volcanic heat, the crushing pressures beneath the ocean, or even the depths of space.

This has the additional benefit of activating the usually dormant wings on X's sides, enabling him to reach even greater degrees of speed and mobility.

Five years later, the two brothers reunite at a robotics convention in Mechatopia, China, where Kotarō is to announce his latest breakthrough in artificial intelligence.

Faced with unanswered questions and imminent destruction, X reluctantly saves Teppei, and the pair flee the Area with soldiers of the Empire in hot pursuit.

Meanwhile, inside the Area, Kotarō discovers that he has been summoned by another of the Empire's soldiers, Major Aramis, to find a way to stop the ultimate B't - a creation known as Raffaello (ラファエロ) that has begun a terrifying and uncontrollable evolution.

Teppei's main goal is to save his brother, but as he and X venture further into the Area and learn more about the Machine Empire, they start to fight for the survival of the human race.

Neo aired between 21 August and 20 November 1997; this season adapts some chapters of the manga but has a derivative storyline and an alternate ending.

[7] Anime Midstream announced on 14 August 2016 during their panel at the AnimeFest convention in Dallas, that they would redistribute the whole series with the Japanese language track, subtitles, and an English dub.