Catch Rayquaza in Pokémon Ruby And Sapphire

So you have Ruby and/or Sapphire? Well, Rayquaza is at Sky Pillar. How to get there is simple.

Steps

Beat the Elite Four.
Switch your bike at the bicycle shop in Mauville City to get a Mach Bike (if you do not have one).
Fly to Pacifidlog Town.
Go right from the Pokémon Center. Surf until you reach a red-haired swimmer (she is moving). At this point, go up and then left. You will find a cave.
Traverse through the cave to get to Sky Pillar.
Now, enter the tower.
You need the Mach Bike to traverse through the puzzle.
- Ride over the cracked floors quickly. It is best to figure out the maze beforehand (Internet or experience-wise).
- On the second floor with cracked tiles, ride to the end of the maze, and let yourself fall through the third to last cracked tile. You'll fall and reach the rock-blocked stairs. This is the only puzzle; the rest is just going up stairs.
Go up the stairs to find Rayquaza at Level 70.