Ah hell. I think that means he's still not able to use it. It takes a while for them to learn that one and even when they do, it only makes a little bit of money first. It's all related to their 'level.' If you check his entry on your pokegear, you'll be able to see that for him.

But yes. Meowths can literally create money from the coin on their head, usually about twenty times a day. It's pretty unique to them, as far as I know. I don't think any other kind of Pokemon learns it naturally... though I wonder if you'd be able to teach it to any other cat by breeding. Huh.