Rayquazza is a large, green dragon/flying pokemon, is one of a kind and very difficult to catch. To get to Rayquazza you need to have won against the champion Steven, then go to Pacifilidog town and surf east. There will be a seemingly endless barrier of rocks, you want to be at the top barrier, follow it along and you will come to a gap (finallly) it is above the female swimmer who seems to be patrolling up and down. Follow the rocks around to the left then go up and BEHOLD the sky pillar! Make sure you have the MACH BIKE as you will need to cycle at top speed over bits of cracked floor. After all that stress you will be out in the sunlight and will be stood before Rayquazza it is very strong and is extreeeeemly hard to catch, I recommend you save your MASTER BALL for this mighty beast and treat it well, thats all I got for now, hope I helped and keep gaming!!!