A kid finds a lighter that's actually a giant robot, and that's the entire show, no elaborate explanation, no training arc, just immediate partnership between a boy and a weapon. The 1981 earnestness means Gold Lightan treats this absurd premise with complete sincerity, which is exactly why it works. You're watching pure mechanical wish-fulfillment without irony or self-awareness getting in the way.
Hiro, a young boy, picks up what looks like a broken lighter in an empty field. The lighter is actually Gold Lightan, a robot that fell to Earth from the Robot Dimension. Whenever Ivalda the Great sends his evil robots to attack, the compact lighter changes into a giant super robot, the Golden Warrior, by traveling along the Rainbow Road. Gold Lightan teams up with Hiro and his gang, the One Pack Rangers, to protect Earth from Ivalda's schemes and his armored forces in this sci-fi mecha series.