Arriving on Earth to inform the Cybertrons there of the impending arrival of the Destron super-weapon, BlackZarak, Grand Maximus provided them with the schematics necessary to create the non-sentient drone, Godbomber. Able to connect to vehicle mode (Super) Ginrai as a tandem trailer, Godbomber could also transport the Transtectors of the three Headmaster Juniors - Cab, Shuta and Minerva - and most importantly, would be able to combine with Super Ginrai, powering him up into the new form of God Ginrai, giving him the strength necessary to battle BlackZarak. Sources: Wikipedia, Seibertron