The Garadain Empire has exhausted the primary resources of their native planet, so they send different space expeditions to find a new world where to live. One of their main objectives is planet Earth. However, Zeku Alba, an alien scientist, decides to rebel against the imperial rule and flees towards the Earth, where he gathers a group of youngs gifted with the power of "psychogenesis", an ability that consists in creating solid matter from mental energy. The most gifted of the squadron is Isamu, a young orphan whose family was killed in the first attack of the Garadain Empire. He is able to generate the powerful robot Govarian, an armor with which he can battle the alien monsters and is able to regenerate thanks to the psychic energy of the pilot. Helped by two other robots created by his team-mates, Isamu, aboard the robot Govarian, defends the Earth in the long war against the alien invaders. (Source: Wikipedia)

Short specials included in the Blu-ray Box 1 & 2 of Gundam Build Fighters. Episode 1: SD Kishi Fighters First Half Episode 2: SD Kishi Fighters Second Half Episode 3: A Letter

8 years ago, Western Civilization visited 19th century Japan. Mechanized dolls and new steam-powered creations began spreading throughout the country. The Wind Gang is a group of doll and steam users who believe in using their creations to violently bring about a new Industrial Era. They attack and destroy the peaceful village of a young doll user named Hiwou one day. Hiwou and his friends escape with a giant doll named Homura. Hiwou now wants to find his father, so that he can help defeat the Wind Gang, and bring peace back to Japan.

The pilot for GR: Giant Robo. However, there were significant changes between the pilot and the actual show, including a different writer and a different director. Thus, the special is less a promo for the series than an alternate version of how the series might have looked.