"By: Lianne Sentar
After the abduction of his brother Kotaro by the Machine Empire, Teppei Takamiya joins forces with X, one of several highly-advanced, artificially intelligent machines known as B'ts (pronounced 'beat'), to rescue him.
B'TX was published in Japan beginning in 1995 by Kadokawa Shoten - it ran originally in the Shounen Ace manga magazaine.
B'TX was subsequently adapted into an anime, featuring a TV series consisting of 25 episodes, and an OVA known as B'TX Neo." from tokyopop.com