Bro, Golden Sun is a great game, I don't know why they limited themselves to release this game for Game Boy, I think it had the potential to be released on a desktop console with better graphics.
Anyway, the plot of Hans and Felix's story is very cool, with several twists and turns, as for the game experience I got stuck many times in the bitter tree part. Good post!
Maybe it was a question of marketing and economics as the Game Boy was not a console with a lot of best-selling games. I agree with you that on other consoles it could be superior in many aspects.