the only way is to trade from FR/LG/XD. To get it in FR&LG, you can get it at the celadon mansion and for XD it is a starter pokemon.
You could trade from FR and LG.
How to change your username How to add a user avatar Why was my post hidden? The points system Question etiquette Flags vs Downvotes Anime FAQ
Type a Pokemon name, type, move or ability to see instant results.