Got to dotted hole thats in five island. Get a Pokemon that knows cut and use it on the door. It wiil open and you have to fall through the holes to get to sapphire. Walk up to it and a person will come and take it and say the password to the rocket hideout. Go to it do the password and then you have to get through battling team rocket grunts and then you get to the scientist win then he gives you the sapphire.