Big X

The Gaira aliens, hidden in the Arctic, plan to conquer Earth. Captured and forced to work for the aliens, Dr. Yan creates the ultimate weapon, a transformable aerial robot called Gloizer X. Entrusted to his daughter Rita, Gloizer X escapes the clutches of the Gaira and lands in Japan, where pilot Jo Kaisaka meets a wounded Rita. Taking up the controls of Gloizer X, Jo and Rita fight against the Gaira invasion.

In 2119, the spaceship Green Sleeves found 3 planets attacked by X23, a moving planet heading Earth. The Earth government ordered Green Sleeves to attack X23, but Dr. Sugita, the captain of Green Sleeves, refused because he believed they could co-exist. Then, the communication with Green Sleeves was cut abruptly... In 2121, Susumu, the son of Dr. Sugita, is visited by strangers. The take him to Dr. Miya, one of the few supporters to Dr. Sugita's decision, while most blamed him as a traitor. Dr. Miya recommends Susumu to join White Pegasus, a team of special medical recuers. Their Micronizer System can shrink human so that they can cure from the inside of the body. Shortly afterwards, X23 has come in visual range at last. Hues - the aliens of X23 - choose Susumu's friend as their first target. Susumu and the other members of White Pegasus manage to defeat Hues inside of his body. But Susumu finds the signals emitted from the chips within Hues are the music composed by himself and his mother, as a gift to Dr. Sugita...

When one space colony declared its independence from the Earth Federation, the devastating 7th Space War, an all-out war between Earth and space, resulted. The Federation responded to the Space Revolutionary Army with mobile suits, called Gundams. However, the Space Revolutionary forces played their trump card and dropped hundreds of space colonies onto the Earth, plunging the planet into a seven-year-long nuclear winter. The Federation collapsed, but the Space Revolutionary Army was unable to invade the Earth in the aftermath of the colony drop. Fifteen years have passed. The year is now After War 0015, and a New Federation has sprung up on Earth to restore order. In space, the colonial leaders have been rebuilding their own forces as well. By chance, fifteen-year-old Garrod Ran has discovered an old Federation mobile suit, the Gundam X, and now he uses it to help out the Vulture ship Freeden in its struggle to keep the powers that be from repeating the mistakes of the past.

Teppei is going to visit his older brother Kotaro Takamiya during a scientific conference after training with a mysterious woman named Karen for the past 11 years. However his plans for a family reunion become stalled when a woman named Aramis kills everyone in the conference to kidnap Kotaro. Teppei on the way to save his brother encounters a broken mechanical horse called B't X who revives thanks to Teppei's blood and is now his aide to save his brother from the mysterious Machine Empire.