"The Brave Fighter Exkizer" is a 39-episode anime series that aired from 1990 to 1991, part of the "Brave" franchise. The story is set in a futuristic world where Earth faces an invasion from the malevolent Zazanga Empire, led by the ruthless Emperor Zazanga. The empire seeks to conquer Earth and exploit its resources, posing a significant threat to humanity. In response, the Earth Defense Force develops advanced robotic technology to combat the invaders.

The protagonist, Yuuta Tomonaga, is a young boy who becomes the pilot of Exkizer, a powerful robot created by the Earth Defense Force. Exkizer is designed to protect Earth from the Zazanga Empire's forces. Yuuta is chosen for his courage and determination, qualities that enable him to harness Exkizer's full potential. Alongside Yuuta are his friends and allies, including his sister, Miki, and fellow pilots who operate other support robots. Together, they form a team dedicated to defending Earth.

The narrative unfolds through a series of battles between Exkizer and the Zazanga Empire's robotic forces. Each episode typically features a new threat or mission, with Yuuta and his team devising strategies to overcome the enemy. The Zazanga Empire deploys various commanders and specialized robots, each presenting unique challenges. The series emphasizes themes of teamwork, bravery, and perseverance as the protagonists face increasingly difficult adversaries.

As the story progresses, the Zazanga Empire's true motives and the origins of their conflict with Earth are gradually revealed. The series explores the personal struggles of both the protagonists and antagonists, adding depth to the characters. Yuuta's growth as a leader and pilot is a central focus, showcasing his development from a determined but inexperienced boy to a capable and confident hero.

The climax of the series involves a final confrontation between Exkizer and the Zazanga Empire's ultimate weapon, culminating in a decisive battle that determines the fate of Earth. The resolution ties together the overarching narrative, providing closure to the conflict while highlighting the enduring spirit of humanity in the face of adversity.