This is probably one of the hardest challenges in the game. Accessible after you have captured either Groudon or Kyogre, and beaten Kecleon or Dusclops again, you can access this stage from both fields.

You play on top of the Sky Pillar, a large tower with old, creaking floors. Rayquaza flies in, roaring, and the battle is on.

Rayquaza starts the duel with a shocking Thunder attack. It paralyzes the ball if it hits, but it takes a minute for the green dragon to charge it, so hit him then. Rayquaza can fly high into the sky, then rip through the air above the field, forming tornadoes. He also hovers above the field, making it harder to hit him.

If you are lucky or skilled enough, defeating this dragon earns you many bonus points.