Question

When can rayquaza learn dragon ascent?

Answer 1

dragon ascent is a tutor move for rayquaza in the games Omega Ruby and Alpha Saphire, Sun and Moon, and Ultra Sun and Ultra Moon.

Comments

This does not asnwer where he can do it — add their locations

Answer 2

Various Move Tutors will teach Dragon Ascent to a Rayquaza. The Move Tutors are:
ORAS: Zinnia's grandmother at Meteor Falls.
SMUSUM: a man in a red shirt in the Pokémon Center in Seafolk Village.
In Pokémon Omega Ruby and Alpha Sapphire, while Rayquaza does not know Dragon Ascent when the player battles it at Sky Pillar, Zinnia will automatically teach it Dragon Ascent (replacing Fly) immediately after the player captures it.

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