In 1981, South Korea, known for its robot animes since 1976's Robot Taekwon V, unleashed Planet Robot Thunder-A. It seems that it combines elements of Mobile Suit Gundam and Trider G7, due to the way the robot looks.
I first noticed this movie when I was looking up South Korean robot anime, and noticed a robot that had pretty colors, so I thought I'd go check it out. I managed to find a clip from the movie on YouTube. It shows two pilots getting into the protagonist robot, and it shows the robot flying in the sky while the movie's theme song plays in the background. The theme song sounds like something musicians like Giorgio Moroder or Deodato could've come up with at the time, albeit with a cheerful-sounding choir singing perfectly in Korean.
I hadn't seen much of this movie (only the 2-minute clip they had on YouTube), but I think this is better than Robot King, another South Korean robot anime that was released in 1981. It is so because it draws influenced from Mobile Suit Gundam. I don't have much to write down anymore, so feel free to comment on whatever your opinion is on this movie!