Dragon Ascent does not exist in the game data of Pokémon X and Y. As a result, a Pokémon knowing Dragon Ascent cannot be traded from Pokémon Omega Ruby and Alpha Sapphire to Pokémon X and Y, and if a Pokémon in Pokémon Bank knows the move it cannot be withdrawn in Pokémon X and Y. In order to be transferred to Pokémon X and Y, the Pokémon must forget Dragon Ascent.
The Japanese name of this move literally means "to paint a dragon and dot its eyes" and serves as a metaphor for the finishing touch in a piece of work that give it "the spark of life". The idiom originated from a legend where Zhang Sengyou, a Chinese painter, completes the dragons on a mural by dotting their eyes and thus literally bringing them to life; they spring out of the temple wall and fly off. The completed dragons immediately ascended to the heavens after the work was done.
Dragon Ascent is the only move with the word "dragon" in its English name that is not Dragon-type.
Because Zinnia teaches Dragon Ascent to the Rayquaza caught at Sky Pillar in Pokémon Omega Ruby and Alpha Sapphire to replace Fly, Dragon Ascent is the only move that can replace an HM move in a game in which the move is available as an HM.
When used by a Rayquaza which has Mega Evolved, this move will play an additional animation before the main animation, and the main animation is also changed slightly.
The only difference about this move from Close Combat is that it is Flying-type and that it can Mega Evolve Rayquaza