so I just beat the key-stone thief in oras (hoopa is OP when its a glitched hoopa being able to know and use hyperspace hole and fury in 1 form) and she said something about meteor falls. so I checked and still nothing. so what do you do? I know it has something to do with sky pillar but idk where that is.
I assume you just fought the Magma/Aqua Admin in Petalburg City? If so, then the next stop is actually meeting Steven in Rustboro City.
Here is a quick walkthrough for the Delta Episode, so you can check out what to do next for yourself.