I Don't Know The Exact Location But If You Talk To The Lady And The Fat-Man In Lilycove Near The Boating House & Contest Hall He Will Tell You The Exact Location :)
Hope I Helped x
There is Only a Sky Pillar
the sky pillar is in pacfidlog town
surf nere the sky tower
RAQUAZA!!!!!! I dont know more than that.........
With an ultra ball or master ball in sky tower. The name of it is Rayquaza :)
In Pokemon Ruby and Sapphire at the top of Sky tower after the Pokemon league emerald before the Pokemon league Diamond, Pearl and Platinum you have to migrate from the GBA Games (Sky Tower is near pfialog)
go to the top floor and and you also fly off to sootopolis
You go find rayquaza at the sky tower. (Behind the town on the water)
Its before Pacifidlog Town, before you reach the town, keep surfing closer to the top, there'll be a gap soon that shapes like a U bend, enter the bend and the Sky Tower will be further above. Use the PokeNav if you are still uncertain
Ecruteak doesn't exist in Pokemon Emerald so there is no Burnt Tower.
Rayquaza is at the top of Sky Tower, which is only in Emerald Version. You can only battle it on the 2nd visit to Sky Tower (as on the first visit, it goes to calm Kyogre and Groudon), and on the 2nd visit it's harder to go throgh the tower.
Sky Pillar is located toward the northern edge of Route 131. As you surf across the water, just find a path that leads upwards to Sky Pillar.