This happened to my pokemon gold game. There is still a few squares in the game where you can still save when this happens but its not worth the effort. get emerald.
When you see the light at the end of the tunnel, the tunnel will collapse
More Bluntly... The light is a train
In English... Everything you work for will be taken from you
I am a pessimist...
It's better to be a pessimist, Because when the glass is half empty you get a refill!