This sound is from Lucario Soundboard

Lucario has been featured in several forms of merchandise, including figurines, plush toys, and the Pokémon Trading Card Game. Lucario can sense and manipulate Aura, a special kind of energy emitted by Ash in the anime, and some special Lucario users who have a special and strong bond with their Lucario creatures.
See also: Pokémon: Lucario and the Mystery of Mew, Mew (Pokémon), Pokémon the Series: XY, Sean Schemmel, List of Pokémon films, and Project M.