Forced to abandon their home planet of Seibertron due to the threat of the Grand Blackhole, Galaxy Convoy prepares to lead his Cybertron warriors to Earth. Just as they are leaving they are confronted by Vector Prime who warns Galaxy Convoy of the threat to the galaxy if the four Planet Force are not gathered. However, Master Megatron has plans of his own for the Planet Force.
Upon the destruction caused by the Grand Black Hole, the cybertron warriors from Planet Seibetron flee to earth in search of the way to stop the Grand Black Hole. They were joined by Vector Prime, an ancient Transformer that were sent by the past to aid and warn them on the dangers of the Grand Black Hole. They were told to gather the legendary planet forces in order to stop the chaos but Master Megatron has his own plans for the planet forces. As they embark on the search, they land on new planets which are inhabited by different Transformer races as well as the Convoys who lead these planets.
Premiered on Network: TV Aichi in JP
Also known as: Transformers: Galaxy Force