how to get equazaua (sorry if spelled not right)

After the 7th gym you should get the mach bike from rydel and go to pacifidlog town and surf east from there until you reach the sky pillar, this can only be done after you settle the controversy in sootopolis and then go up the sky pillar but you must have skills on the bike and go up to raquaza and it will be at level 70 and will know the moves rest, extreme speed, fly and outrage and has extemely high attack and sp. Attack you can also do this after you beat the elite 4.

Well, first you must have met it for the first time, which is when you get it's help to prevent Groudon and Kyogre from destroying all of Hoenn. After that incident you'll be able to catch it, without having to beat the Pokemon Leauge first. You'll need a Mach Bike, and a Pokemon with Surf. Go to Route 131 by flying to Pacifidlog Town, the surf east. Stay up on the north side until you see a gap. Go through the gap and enter Sky Pillar. The first time you met Rayquaza, it was pretty simple because all you had to do was to go up the stairs. Now, it won't be so easy. There will be cracks all over the room, and you'll need to use your Mach Bike and zip through all the cracks in one go, or you'll fall to the floor below. Trust me, it's really hard.

Once you've gotten through all the 'crack rooms' you'll see Rayquaza again. Save, because this guy is hard to catch unless you decide to use your Master Ball. If you don't want to use it, buy some Timer Balls. Rayquaza will be at Level 70, so be prepared.