How does lucario "talk"?

[Lucario]

I just finished watching Lucario & The mystery of mew, and there was one thing I didn't understand.

At various points in the movie, lucario seems to talk. I know that meowth learned talking instead of 3 moves, but how does lucario talk?
I'm guessing it's through aura, but it seems that all the characters hear it, not just ash, but I don't know. Does anyone know how lucario talks?

 

[The 4th Kira]

Um, telepathically perhaps? We saw Lapras do that as well, so apparently even some non-Psychic Pokemon can communicate that way.

 

[Iceshadow3317]

First off, the main pokemon will almost always talk in some way to make the movie more understandable. I always guessed that Lucario used Aura. But Zorua also talks. It is just something they do.

All pokemon are capable of talking like humans, it just takes time for them to learn. Meowth is the only one who has taken the time to learn.