what to do after catching rayquaza emerald

The only thing here is a spit of sandy beach and a cave entrance -- so all that is left is to head in, right? Rayquaza appears at the top of the Sky Pillar, and in Emerald, it will disappear completely after it has been either caught or defeated. For Ninja Boy Laos, thief his weezing and you get a smoke ball. Head there and climb the tower. You can get Rayquaza either before or after the Elite 4, it is your choice.