The mythical Pokemon Deoxys is soon to be made available to players of Pokemon Black 2 and White 2! Deoxys is one of the last remaining pure-event legendaries that has not been made available over wi-fi yet.
The event will start May 8th in America. No word yet on an end date or dates for other regions.
In other news, Nintendo have recently released a short teaser for the upcoming Pokemon movie that shows Mewtwo transforming into the new Pokemon that was revealed a few weeks ago. This heavily implies that it is in fact a new Mewtwo form, not a separate Pokemon.