It is not in a city, it is to the left of pacificlog town and when you see all the trainers, you start going up. There will be a fork in the road(river) go to the left than it all up from there. There will be some land. Congrats!!!!! You have made it to the skypillar!!!!!! I have a rayquaza at LV.84

Rayquaza will be at LV.70.

go east of pacifadol town and use ur master ball on him u can catch him with 7
badges and save b4 u fight him and keep restarting until YOU SEE HIM SHINY!!
i have all 386 pkmn on my emerald all of which are shiny! i can prove it on youtube

go to pacafidlog town and go to the rocks at the top and surf east till you get to a gap go past the gap and skypillar

bring match bike

rayquaza lv:70

The syy pillar is not in a city it isin route 131 which is east of pacificlog city and it contains rayquaza lv 70 and other powerful pokemon life altaria claydol goldbat and bannete.