jaiko doraemon

Makes sense. We never actually see him married to Jaiko, we only see these images. Nobita wouldn't know about photoshop in the 70s so it checks out. It would be one of these scenarios where Doraemon was ALWAYS with Nobita, it was a fixed point in time. He always marries Shizuka because Doraemon was always there to help him. doraemon dan nobita