I used my Chatot's Chatter attack out of battle and it let me record a voice.
And I said ''Hey yeah yeah yeah yeah!'' But when I used it in battle it just sounded like a distorted mess.
Is my Chatot broken, or something else?
When a person's voice is recorded for the move, the noise will always be distorted, possibly a failsafe to prevent obscene language from being emitted by the game.
From Bulbapedia http://bulbapedia.bulbagarden.net/wiki/Chatter_(move)#Trivia