Ninja Senshi Tobikage

A boy named Joe Maya lives on Mars when he witnesses an alien battle. The conflict involves the princess of Planet Radorio, who is being attacked by forces from Planet Zaboom. The princess has fled her planet after its emperor, who seeks to conquer the universe, crashed on Mars. Joe accidentally boards the princess's ship, setting off a series of events that change their lives. Along with his friends, Joe uses three powerful mecha beasts to fight against the emperor of Zaboom and his army. Facing overwhelming odds, they struggle until a ninja robot named Tobikage appears unexpectedly. Tobikage can combine with the three mecha beasts, granting him formidable power. With Tobikage's help, Joe continues the fight against the forces of Zaboom.