Bismark(1984)

Bismarck is a sci-fi anime series centered on four young pilots recruited by the global government to operate a colossal robot stationed on Jupiter's moon Ganymede. Their mission: pilot Bismarck against Deathcula, a malevolent cosmic force bent on conquering the solar system. The story blends classic mecha action with space opera stakes, following these teenagers as they're thrust into humanity's last line of defense. Deathcula's relentless expansion threatens Earth's survival, forcing the inexperienced crew to master their giant machine while uncovering the true nature of their enemy. Bismarck explores themes of responsibility, teamwork, and sacrifice as ordinary youths become extraordinary heroes in an interstellar conflict.