A group of young pirates from space come to Earth to obtain the "Greatest Treasure in the Universe", which can only be acquired after obtaining the Ultimate Powers of the 34 Super Sentai. However, they end up running afoul of the Space Empire Zangyack, whose earlier invasion forces were wiped out by the 34 Super Sentai long ago. As a result, the space pirates use "pirate copies" of the powers of the older teams and fight the Zangyack forces as the Gokaigers.

All across the universe, the Jark Matter empire has conquered everything they see. Meanwhile, the insurgent force called "Rebellion" is established and gathers nine ultimate saviors from across the galaxy who are chosen by the Kyu Globes, magical spheres with the power of the constellations.

A boy and his homemade robot enter the toughest competition in the universe while attempting to free their oppressed home from an evil empire.