The Princess and the Robot(1984)

Lord Raider and an endearing little robot companion reside in the far-off realm of Planet Carrotland. As fate would have it, a cosmic spark from the radiant Pulsar star strikes the robot just as he becomes smitten with Princess Mimi, a charming pink bunny. However, their newfound love faces a significant obstacle when the king decrees a grand tournament in the kingdom, intent on determining who shall earn the honor of marrying the Princess.