Question

When do I catch Rayquaza in Emerld?

Answer 1

It is at the Sky Pillar Peak. Return there for a second time after going up once in the storyline. Bring the Mach Bike.

Answer 2

After you go to The Sky Pillar to find it during the story to Break up the fight between Kyogre and Groudon. When that whole ordeal is over, you can go back, and it will once again be on top of the Sky Pillar. Raquayza is at Level 70, and is very hard to catch. If you KO it, it will NOT re-appear.

Comments

I said WHEN not WHERE.

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He said when...
"...Break up the fight between Kyogre and Groudon. When that whole ordeal is over, you can go back..."