Pokémon X and Pokémon Y

The official site has updated and given details on how to receive event Pokémon. This process runs similar to previous games with you selecting Mystery Gift and then selecting the appropriate option. However, the details have provided a new method of obtaining event Pokémon. In addition to Local Wireless, Nintendo Network Download and InfraRed, the game also lists a new method of downloading: Serial Codes. Presumably this will run akin to the Serial Codes on the Global Link within Generation V. You can also have up to 24 Wonder Cards before having to make room for a new event.

Events are also locked to the console & game's region, rather than the game's language so if you're playing a Japanese game in English, you will only receive Japanese events but Japanese games in English cannot receive North American events and vice versa. As a reminder, the Torchic event will be live online for all regions from October 12th to January 15th.

Also, more info on Pokémon Bank:

It has been announced that the storage app, Pokémon Bank, is due for release in North America on December 27th. With it comes a 30 day free pass if you download and play the application before February 1st. From then on, if you wish to use the services, including Poke Transporter, you will need to pay a yearly fee of $4.99. It also confirms that you cannot have items on your Pokémon when you send it to Bank, with the items returning to your bag.

They also updated the Pokémon Bank page.