You have until Jan 15, 2014 to pick it up
Starting October 12th at the launch of Pokemon X and Y, you'll be able to pick up a brand new Torchic -- one of the starters of Generation III (Ruby, Sapphire, Emerald). After connecting to the internet and accepting it via Wi-Fi, it'll arrive at level 10, which is a perfect opportunity to basically raise him from the beginning of the game as a potential starter.
As an added bonus the Torchic come with a piece of Blazikenite, which allows him to obtain his Mega Evolution -- Mega Blaziken. Honestly, this is a pretty amazing promotion, especially if you've been picking up your free GameStop distributed legendaries.