"Wrestler Gundan Ginga-hen Seisenshi Robin Jr." is a 1989 anime series that blends elements of science fiction, sports, and action. The story is set in a futuristic universe where professional wrestling has evolved into a high-stakes intergalactic sport. The protagonist, Robin Jr., is a young and talented wrestler who inherits the legacy of his father, a legendary wrestler known as Robin Mask. Following his father's mysterious disappearance, Robin Jr. embarks on a journey to uncover the truth while striving to become the greatest wrestler in the galaxy.

The narrative unfolds as Robin Jr. joins the Galactic Wrestling Federation, a prestigious organization that hosts matches across various planets. The federation is not merely a platform for athletic competition but also a battleground for political intrigue and power struggles. Robin Jr. encounters a diverse array of opponents, each with unique fighting styles and motivations, ranging from honorable competitors to ruthless adversaries seeking dominance. Along the way, he forms alliances with fellow wrestlers, including the skilled and loyal Tiger Mask, who becomes both a rival and a trusted ally.

As Robin Jr. progresses through the ranks, he uncovers a conspiracy involving the federation's leadership, which is tied to his father's disappearance. The series delves into themes of perseverance, legacy, and the pursuit of justice, as Robin Jr. confronts not only physical challenges in the ring but also moral dilemmas outside of it. The climax of the story sees Robin Jr. facing off against the federation's corrupt leaders in a final showdown, where he must prove his worth as a wrestler and a hero.

The series features a mix of intense wrestling matches, character-driven drama, and interstellar adventure, creating a dynamic and engaging narrative. Robin Jr.'s growth as a wrestler and his quest for truth form the core of the story, supported by a cast of memorable characters and a richly developed futuristic setting.